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Modified microstructure and enhanced mechanical performance of wire arc additive manufactured 2319 aluminum alloy via interlayer friction stir processing 认领 引用
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作者 DAI Guo-qing YE Wei-long +6 位作者 XING Yun-jing YAO Jie JIANG Tao GUO Yan-hua LU Hai-fei LU Jin-zhong SUN Zhong-gang 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第6期2423-2437,共15页
In order to eliminate metallurgical defects and improve mechanical properties of the builds,the interlayer friction stir processing(FSP)technology was employed to assist in wire-arc additive manufacturing(WAAM)high-st... In order to eliminate metallurgical defects and improve mechanical properties of the builds,the interlayer friction stir processing(FSP)technology was employed to assist in wire-arc additive manufacturing(WAAM)high-strength 2319 aluminium alloy,and comprehensive analysis was investigated on the microstructural evolution and mechanical properties.The grains at the bottom of the builds grew,and the proportion of recrystallized grains increased due to the cyclic thermal influence,resulting in a more isotropic microstructure.By applying interlayer FSP to WAAM,the coarse columnar grains in the top regions were refined by 95%,and the proportion of high angle grain boundaries(HABs)increased from 2.5%to 62.3%,effectively reducing the dislocation density.During the friction stir processing,the precipitation phase was fragmented,thereby providing a pinning effect that hinders dislocation accumulation.With an increase in plastic deformation,the dislocation density increased,triggering dynamic recrystallisation.Additionally,the mechanical properties of the builds prepared using hybrid method were assessed.The as-deposited builds exhibited an average ultimate tensile strength(UTS)and elongation(EL)of 225 MPa and 6.2%,respectively.By contrast,the tensile properties of stirring builds in the stable region were increased,with an average UTS and EL of 248.5 MPa and 12.7%respectively.In summary,this work provides practical guidelines for optimizing the additive manufacturing quality of high-strength aluminium alloys. 展开更多
关键词 2319 aluminium alloy wire-arc additive manufacturing(WAAM) friction stir processing(FSP) microstructure evolution mechanical properties
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Microstructural evolution and tensile deformation behaviors of fine-grained Fe40Mn20Co20Cr15Si5high entropy alloy prepared by friction stir processing 认领 引用
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作者 Jia LIN Yuan FANG +7 位作者 Wen WANG Peng HAN Ting ZHANG Qiang LIU Ya-ting XIANG Feng-ming QIANG Ke QIAO Kuai-she WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第3期842-854,共13页
A fine-grained metastable dual-phase Fe40Mn20Co20Cr15Si5high entropy alloy(CS-HEA)with excellent strength and ductility was successfully prepared by friction stir processing(FSP).The microstructural and... A fine-grained metastable dual-phase Fe40Mn20Co20Cr15Si5high entropy alloy(CS-HEA)with excellent strength and ductility was successfully prepared by friction stir processing(FSP).The microstructural and mechanical properties of the fine-grained CS-HEA were characterized.The results showed that as-cast shrinkage cavities and elemental segregation were eliminated.The average grain size was refined from 121.1 to 5.4μm.The face-centered cubic phase fraction increased from 23%to 82%.During tensile deformation,dislocation slip dominated at strains ranging from 5%to 17%,followed by transformation induced plasticity(TRIP)from 17%to 26%,and twin induced plasticity(TWIP)from 26%to 37%.The yield strength,ultimate tensile strength,and elongation of the fine-grained CS-HEA were 503 MPa,1120 MPa,and 37%,respectively.The strength-ductility synergy of fine-grained CS-HEA was attributed to the combined effects of TRIP,TWIP,dislocation strengthening,and fine-grained strengthening. 展开更多
关键词 friction stir processing metastable high entropy alloy fine-grained microstructure deformation behaviors transformation-induced plasticity
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Numerical Simulation on Thermomechanical Coupling Process in Friction Stir-Assisted Wire Arc Additive Manufacturing 认领 引用
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作者 Li Long Xiao Yichen +2 位作者 Shi Lei Chen Ji Wu Chuansong 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第1期1-8,共8页
Wire arc additive manufacturing(WAAM)has emerged as a promising approach for fabricating large-scale components.However,conventional WAAM still faces challenges in optimizing microstructural evolution,minimizing addit... Wire arc additive manufacturing(WAAM)has emerged as a promising approach for fabricating large-scale components.However,conventional WAAM still faces challenges in optimizing microstructural evolution,minimizing additive-induced defects,and alleviating residual stress and deformation,all of which are critical for enhancing the mechanical performance of the manufactured parts.Integrating interlayer friction stir processing(FSP)into WAAM significantly enhances the quality of deposited materials.However,numerical simulation research focusing on elucidating the associated thermomechanical coupling mechanisms remains insufficient.A comprehensive numerical model was developed to simulate the thermomechanical coupling behavior in friction stir-assisted WAAM.The influence of post-deposition FSP on the coupled thermomechanical response of the WAAM process was analyzed quantitatively.Moreover,the residual stress distribution and deformation behavior under both single-layer and multilayer deposition conditions were investigated.Thermal analysis of different deposition layers in WAAM and friction stir-assisted WAAM was conducted.Results show that subsequent layer deposition induces partial remelting of the previously solidified layer,whereas FSP does not cause such remelting.Furthermore,thermal stress and deformation analysis confirm that interlayer FSP effectively mitigates residual stresses and distortion in WAAM components,thereby improving their structural integrity and mechanical properties. 展开更多
关键词 friction stir processing wire arc additive manufacturing numerical simulation thermomechanical coupling temperature field deformation
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Microstructure evolution and damping behavior of ZA27/6061Al composites fabricated by friction stir processing 认领 引用
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作者 Lin FU Hong-jie JIANG +4 位作者 Chong-yu LIU Hong-feng HUANG Shu-hui LIU Li-li WEI Zheng-bing MENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第8期2251-2263,共13页
To improve the high-temperature damping performance of aluminum alloys,the ZA27 alloy as a reinforcement phase was integrated into the 6061 Al alloy by friction stir processing(FSP)to develop ZA27/6061 aluminum matrix... To improve the high-temperature damping performance of aluminum alloys,the ZA27 alloy as a reinforcement phase was integrated into the 6061 Al alloy by friction stir processing(FSP)to develop ZA27/6061 aluminum matrix composites with enhanced high-temperature damping capacity.The results demonstrate that FSP effectively fuses the ZA27 reinforcement phase with the 6061 Al alloy,resulting in no interfacial reactions.The introduction of the ZA27 reinforcement phase leads to a reduction in the average grain size and an increase in the dislocation density within the composites.At about 275°C,an internal friction(IF)peak was observed in the ZA27/6061 aluminum matrix composites.The IF value is 933.9%higher than that of the 6061-FSP Al alloy.The improved interfacial damping resulting from grain refinement,along with the inherent superior damping characteristics of the reinforcement,significantly enhances the hightemperature damping ability of the ZA27/6061 aluminum matrix composites. 展开更多
关键词 friction stir processing ZA27 reinforcement phase aluminum matrix composites microstructure damping performance
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Microstructures and mechanical properties of friction stir welded and processed high entropy alloys 认领 引用
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作者 Kang Chen Jian Miao +2 位作者 Huijie Zhang Qi Cheng Yingling Wang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第1期80-108,共29页
High entropy alloys(HEAs)have recently attracted significant attention due to their exceptional mechanical properties and potential applications across various fields.Friction stir welding and processing(FSW/P),as not... High entropy alloys(HEAs)have recently attracted significant attention due to their exceptional mechanical properties and potential applications across various fields.Friction stir welding and processing(FSW/P),as notable solid-state welding and processing techniques,have been proved effectiveness in enhancing microstructures and mechanical properties of HEAs.This review article summarizes the current status of FSW/P of HEAs.The welding materials and conditions used for FSW/P in HEAs are reviewed and discussed.The effects of FSW/P on the evolutions of grain structure,texture,dislocation,and secondary phase for different HEAs are highlighted.Furthermore,the influences of FSW/P on the mechanical properties of various HEAs are analyzed.Finally,potential applications,challenges,and future directions of FSW/P in HEAs are forecasted.Overall,FSW/P enable to refine grains of HEAs through dynamic recrystallization and to activate diverse deformation mechanisms of HEAs through tailoring phase structures,thereby significantly improving the strength,hardness,and ductility of both single-and dual-phase HEAs.Future progress in this field will rely on comprehensive optimization of processing parameters and alloy composition,integration of multi-scale modeling with advanced characterization for in-depth exploration of microstructural mechanisms,systematic evaluation of functional properties,and effective bridging of the gap between laboratory research and industrial application.The review aims to provide an overview of recent advancements in the FSW/P of HEAs and encourage further research in this area. 展开更多
关键词 High entropy alloys Friction stir welding/processing Microstructure Mechanical property
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Microstructural tailoring and property enhancement via friction stir processing of additively manufactured steel and Ti6Al4V alloy 认领 引用
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作者 Md Parwez Alam Md Anwar Ali Anshari +1 位作者 Mohamed M.El-Sayed Seleman Murshid Imam 《China Welding》 CAS 2026年第1期17-33,共17页
Friction stir processing(FSP) has emerged as a transformative solid-state technique for enhancing the mechanical performance and microstructural integrity of metallic materials,particularly in the context of additive ... Friction stir processing(FSP) has emerged as a transformative solid-state technique for enhancing the mechanical performance and microstructural integrity of metallic materials,particularly in the context of additive manufacturing(AM).This study demonstrates the effectiveness of FSP as a post-processing strategy for two distinct AM systems:wire arc additive manufacturing(WAAM) of low-carbon steel and selective laser melting(SLM) of Ti6Al4V alloy.In the case of WAAM fabricated steel,FSP significantly refined the coarse dendritic microstructure into ultrafine equiaxed grains,resulting in a 21 %-24 % increase in hardness and enhanced tensile properties at the overlapping regions.Similarly,for SLM fabricated Ti6Al4V,FSP eliminated the columnar prior-β grains and residual porosity,yielding a homogenous α+β structure with improved strengthductility balance and reduced anisotropy.These improvements were attributed to the dynamic recrystallization,conversion of low-angle to high-angle grain boundaries,and homogenization of phase constituents induced by FSP.Despite challenges such as tool wear and fixturing complexity,the study confirms that FSP can reliably bridge the performance gap in AM components by healing solidification defects,mitigating anisotropy,and tailoring the local microstructure.The findings position FSP as a versatile and scalable post-processing technique,crucial for advancing high-performance,application-ready components in aerospace,biomedical,and structural applications. 展开更多
关键词 Friction stir processing Wire arc additive manufacturing Selective laser melting EN8 Steel Ti6Al4V alloy Microstructural modification
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Mechanical and electromagnetic shielding properties of ultrafine-grained Mg98.5Zn0.5Y alloy prepared by underwater friction stir processing 认领 引用
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作者 Wenjie Lu Jialiang Dong +6 位作者 Zhongxue Feng Guangyu Zhang Rui Shao Yueyi Wang Jun Tan Xianhua Chen Jianhong Yi 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第7期584-602,共19页
The coarse grains and the difficulty in refining the second phase of the traditionally cast LPSO phase magnesium alloy have limited the further improvement of its mechanical and electromagnetic shielding properties.In... The coarse grains and the difficulty in refining the second phase of the traditionally cast LPSO phase magnesium alloy have limited the further improvement of its mechanical and electromagnetic shielding properties.In this paper,the extruded Mg98.5Zn0.5Y alloy was used as the base material,and the underwater friction stir processing(UFSP)technique was adopted to successfully prepare an ultrafine-grained structure by suppressing the thermal accumulation effect.The research results show that compared with the conventional friction stir processing(FSP),UFSP further refined the average grain size from 10.1μm to 6.0μm and increased the volume fraction of the LPSO phase by 6.63%.Under the combined effect of fine grain strengthening and second phase strengthening,the ultimate tensile strength of the alloy increased from 253.3 MPa to 276.4 MPa,and the elongation increased from 14.2 to 17.3%.Meanwhile,the electromagnetic interference shielding effectiveness of the UFSP samples remained between 87.4 and 108.3 dB in the 30–6000 MHz frequency band,which was optimized compared to the FSP samples(89.3–105.5 dB).This was mainly attributed to the interface polarization effect caused by a large number of grain boundaries and the multiple reflection losses of electromagnetic waves by the layered LPSO structure.The study indicates that UFSP can effectively prepare Mg98.5Zn0.5Y alloys with better comprehensive properties,providing a new approach for their application in electromagnetic protection fields. 展开更多
关键词 Underwater friction stir processing Mg98.5Zn0.5Y alloy Mechanical properties Electromagnetic shielding LPSO phase
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Achieving excellent strength-ductility synergy of wire-arc additive manufactured Mg-Gd-Y-Zr alloy via friction stir processing 认领 引用 被引量：3
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作者 Wenzhe Yang Kuitong Yang +3 位作者 Haiou Yang Zihong Wang Chenghui Hu Xin Lin 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第6期2500-2508,共9页
Friction stir processing(FSP)was applied to wire-arc additively manufactured(WAAM)Mg-9.54Gd-1.82Y-0.44Zr(GW92K)alloy to address coarse microstructure and porosity defects inherent to layer-by-layer deposition.FSP indu... Friction stir processing(FSP)was applied to wire-arc additively manufactured(WAAM)Mg-9.54Gd-1.82Y-0.44Zr(GW92K)alloy to address coarse microstructure and porosity defects inherent to layer-by-layer deposition.FSP induced complete dissolution of the coarse Mg5(Gd,Y)eutectic network(initial size:3.3±0.5μm)and triggered dynamic recrystallization,achieving a 69.5%grain refinement from 16.4μm(WAAMed)to 5.0μm(FSPed).This microstructural transformation enhanced ultimate tensile strength(UTS)by 32%(217±3 MPa→286±2 MPa),yield strength(YS)by 46%(124±2 MPa→182±7 MPa),and elongation(EL)by 35%(9.7±1.1%→13.1±1.4%).Quantitative analysis via Hall-Petch relationship confirmed that grain refinement contributed~50 MPa(79%)of the total YS increment,while nano-precipitation(β/βphases<20 nm)effects accounted for the remaining~13 MPa.The simultaneous strength-ductility enhancement originates from FSP-induced defect elimination(porosity reduction:1.75%→0.18%)and dual-phase grain boundary pinning by Zr particles andβ-Mg5(Gd,Y)precipitates.These findings establish FSP as a viable post-treatment for overcoming WAAM limitations in high-performance Mg-RE alloy fabrication. 展开更多
关键词 Additive manufacturing Friction stir processing Mg-Gd-y-Zr alloy Microstructure Mechanical properties.
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Superplastic behavior of fine-grained Ti-10V-2Fe-3Al alloy fabricated by friction stir processing 认领 引用 被引量：1
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作者 Kai Wang Wenjing Zhang +3 位作者 Takuya Ogura Yoshiaki Morisada Xinqing Zhao Hidetoshi Fujii 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第3期26-36,共11页
Ti-10V-2Fe-3Al alloy with fine-grainedβphases was fabricated by friction stir processing with opti-mized processing parameters.The superplastic behavior of the specimens was investigated by tensile deformation at dif... Ti-10V-2Fe-3Al alloy with fine-grainedβphases was fabricated by friction stir processing with opti-mized processing parameters.The superplastic behavior of the specimens was investigated by tensile deformation at different strain rates and temperatures,and an optimal superplastic elongation of 634%was achieved at 700℃ and 3×10-4/s.An annealing treatment at 650℃ for 60 min showed a mi-crostructure withαprecipitates distributed in theβmatrix in the friction stir specimen.Such pre-heat treatment improves the superplasticity of the specimen,achieving an elongation of up to 807%at 750℃ and 3×10-4/s.The influences of tensile temperatures and strain rates on the microstructural evolution,such as grain size variation,grain morphology,and phase transformations,were discussed.The super-plastic deformation behavior of fine-grained Ti-10V-2Fe-3Al alloy is controlled by grain boundary sliding and accompanied by dynamic phase transformation and recrystallization. 展开更多
关键词 Ti-10V-2Fe-3Al alloy Friction stir processing Superplasticity Microstructural evolution Pre-heat treatment
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Osteoblastic differentiation and antibacterial activity of re duce d graphene oxide modified titanium alloy implant surfaces prepared via friction stir processing 认领 引用 被引量：1
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作者 Zhi Yang Deyu Jiang +5 位作者 Manli Zhou Xianfang Zhang Min Min Liqiang Wang Wenhao Qian Yuanfei Fu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第33期150-162,共13页
To promote early rapid osteogenesis and prevent late implant-related infection,it is critical to develop ef-fective and reliable surface treatment technologies for enhancing both osteogenic and antibacterial prop-erti... To promote early rapid osteogenesis and prevent late implant-related infection,it is critical to develop ef-fective and reliable surface treatment technologies for enhancing both osteogenic and antibacterial prop-erties of titanium alloy implants.Reduced graphene oxide(rGO)is considered a promising modification candidate.However,whether rGO retains its osteogenic and antibacterial functions after being applied to modify titanium alloy surfaces depends on the surface treatment technology employed.In this study,rGO was integrated onto the surface of Ti-35Nb-2Ta-3Zr(TNTZ)alloy through friction stir processing(FSP),yielding a consolidated TNTZ/F-rGO composite.The incorporation of rGO not only significantly im-proved the microhardness and hydrophilicity of the material,but also exhibited positive biological effects in vitro experiments:it effectively promoted the proliferation,osteogenic differentiation,alkaline phos-phatase(ALP)production and extracellular matrix mineralization of BMSCs.Furthermore,TNTZ/F-rGO ex-hibited potent antibacterial activity via surface-contact mechanisms.In summary,the rGO-modified in-tegrated titanium alloy has excellent osteogenic properties and high-efficiency antibacterial ability.This study provides new insights and strategies for the design of graphene-based biomaterials and implant surface modification technologies. 展开更多
关键词 Osteogenesis Titanium alloy implants Friction stir processing Implant surface modification
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Research on strength-ductility and fracture behavior of ultra-fine bio-magnesium alloys via double-sided friction stir processing using liquid CO2 cooling 认领 引用
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作者 Kun Sheng Shaokang Guan +2 位作者 Yufeng Sun Yoshiaki Morisada Hidetoshi Fujii 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第8期3725-3739,共15页
Bio-magnesium(Mg)alloys exhibit excellent biocompatibility and biodegradability,making them highly promising for implant applications.However,their limited strength-ductility balance remains a critical challenge restr... Bio-magnesium(Mg)alloys exhibit excellent biocompatibility and biodegradability,making them highly promising for implant applications.However,their limited strength-ductility balance remains a critical challenge restricting widespread use.In this study,ultra-fine-grained and homogeneous Mg alloys were fabricated using double-sided friction stir processing(DS-FSP)with liquid CO2 rapid cooling,leading to a significant enhancement in the strength-ductility synergy of the stirred zone.The results demonstrate that DS-FSP samples exhibit simultaneous improvements in ultimate tensile strength(UTS)and elongation,reaching 334.1±15 MPa and 28.2±7.3%,respectively.Compared to the non-uniform fine-grained microstructure obtained through single-sided friction stir processing,DS-FSP generates a uniform ultra-fine-grained structure,fundamentally altering the fracture behavior and mechanisms of Mg alloys.The DS-FSP samples exhibit irregular fracture patterns due to variations in basal slip system activation among different grains.In contrast,single-sided friction stir processing samples,characterized by a fine-grained yet heterogeneous microstructure,display flat shear fractures dominated by high-density dislocation initiation induced by twin formation,with fracture propagation dictated by the non-uniform texture.By achieving an ultra-fine grain size and homogeneous texture,DS-FSP effectively modifies the fracture mechanisms,thereby enhancing the strength-ductility balance of bio-magnesium alloys. 展开更多
关键词 Bio-magnesium alloys Double-sided friction stir processing Homogeneous microstructure Ultra-fine grain Strength-ductility Fracture behavior
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A comprehensive review of microstructure and mechanical properties of friction stir processed magnesium alloys and composites 认领 引用
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作者 Maryam Mehdizade Hossein Keshavarz +3 位作者 Fatemeh Marashi-Najafi Morteza Tayebi Amir Mostafaei Ali Reza Eivani 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第9期4089-4129,共41页
Friction stir processing(FSP)induces severe plastic deformation,generating intense strains and localized heating,which modifies the surface and enables the fabrication of magnesium(Mg)-based composites.This technique ... Friction stir processing(FSP)induces severe plastic deformation,generating intense strains and localized heating,which modifies the surface and enables the fabrication of magnesium(Mg)-based composites.This technique refines the microstructure of Mg alloys,enhancing mechanical properties—particularly ductility,a key limitation of these HCP alloys.This review addresses the underlying microstructural evolution during FSP of Mg alloys and Mg-matrix composites,including(i)grain refinement via continuous and discontinuous dynamic recrystallization(CDRX and DDRX),(ii)fragmentation and redistribution of secondary phases and intermetallics,(iii)transformation of low-and high-angle grain boundaries,and(iv)additional microstructural changes induced by external reinforcements.This review provides a comprehensive analysis of the strengthening mechanisms and their impact on the mechanical properties of FSP Mg alloys and Mgmatrix composites(MMCs).The paper examines the correlation between FSP processing parameters,microstructural evolution,and resulting mechanical properties.It critically highlights how the type of reinforcement and the dynamic recrystallization induced by friction stir processing influence grain boundary character and,consequently,the material’s strengthening response.It includes a comparative evaluation of yield stress,ultimate tensile strength,microhardness,elongation,and fractography for various FSP-treated Mg alloys and MMCs,including AZxx,WExx,ZExx,ZKxx,AMxx,AExx,and Mg-rare earth alloys.Additionally,the novelty of this review lies in its emphasis on connecting microstructural transformations to mechanical performance trends across different alloy systems and processing strategies,an aspect that has been underexplored in previous reviews.Recent advancements in FSP techniques and their implications for improving the performance of Mg-based materials are also discussed. 展开更多
关键词 Mg-based composites Friction stir processing Surface modification Microstructure Mechanical properties Dynamic recrystallization
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Tailoring microstructure and strength-ductility synergy in AZ91D/ZrO2 magnesium matrix composite by dual eccentric-pin tool friction stir processing 认领 引用
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作者 Ashish Kumar Long Li +5 位作者 Lei Shi Lu Liu Xiang Zhang Virendra Pratap Singh Surendra Kumar Patel Chuansong Wu 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第11期5669-5687,共19页
The inherent trade-off between ductility and strength in Mg alloys remains a significant challenge,primarily governed by microstructural distribution and texture characteristics.Friction stir processing(FSP),a severe ... The inherent trade-off between ductility and strength in Mg alloys remains a significant challenge,primarily governed by microstructural distribution and texture characteristics.Friction stir processing(FSP),a severe plastic deformation(SPD)technique,refines microstructures by generating fine grains,uniformly dispersed fragmented particles,and a high fraction of high-angle grain boundaries(HAGBs),thereby facilitating superplastic forming at high strain rates and low temperatures.In the present work,a dual eccentric-pin tool(DEPT)FSP was employed to incorporate ZrO2 particles into a 6 mm thick AZ91D Mg alloy,leading to the formation of high volume{10-12}twins,dislocations,and β-Mg17Al12 precipitates within the stirred zone.The microstructural evolution and mechanical behaviour of the stir zone under various process parameters were analysed using scanning electron microscopy(SEM),X-ray diffraction(XRD),electron backscatter diffraction(EBSD),and transmission electron microscopy(TEM).The DEPT enhanced plastic shearing and dynamic recrystallization,significantly reducing the grain size from 15.6μm to 2.35μm while promoting uniform dislocation distribution within the stir zone(SZ).Grain orientation analysis revealed a transition from basal to prismatic texture dominance(29.3% volume fraction)due to intensified radial-tangential coupling shear deformation,facilitating the activation of non-basal slip systems.The DEPT evidently improved the hardness of the SZ from 58 to 92 HV and increased tensile strength from 234 MPa to 325 MPa while maintaining an elongation of 23.8%,achieving an optimal strengthductility balance.This work presents a one-step approach for tailoring microstructural heterogeneity and enhancing mechanical properties in AZ91D/ZrO2 composites using the DEPT FSP technique.The method provides an effective strategy for mitigating the strength-ductility trade-off commonly observed in Mg alloys. 展开更多
关键词 Friction stir processing(FSP) Magnesium alloys Strength-ductility synergy Tailoring microstructure Non-basal texture Dual Eccentric-Pin Tool(DEPT)
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Synergistic regulation of texture and second phases to enhance the mechanical properties and long-term corrosion resistance of friction stir processed Mg-14Gd-0.6Ce-0.5Zr alloy 认领 引用
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作者 Dongzhen Wang Xiaoya Chen +4 位作者 Zheng Wu Quanan Li Hongxi Zhu Qiansen Liu Tianyao Guo 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第10期4912-4932,共21页
In this study,friction stir processing(FSP)was employed to modify the as-cast Mg-14Gd-0.6Ce-0.5Zr alloy,and the effects of texture evolution and distribution of second phases on mechanical properties were systematical... In this study,friction stir processing(FSP)was employed to modify the as-cast Mg-14Gd-0.6Ce-0.5Zr alloy,and the effects of texture evolution and distribution of second phases on mechanical properties were systematically investigated.The results show that friction stir processing effectively refined the coarse Mg5Gd phases into nanoscale second phases uniformly distributed along grain boundaries.The synergistic effect of texture weakening and second phases refinement significantly enhanced the tensile strength and elongation of the FSP-1000-120 alloy to 302.1 MPa and 18.3%,respectively,representing increases of 20.8%and 281.3%compared to the as-cast alloy.The as-cast alloy has a lower corrosion rate in the initial stage due to fewer micro-galvanic corrosion sites.However,the uniform distribution of the second phase in the FSP-treated(FSPed)alloy contributes to the formation of a more complete and dense corrosion product film.After 120 h of immersion,the as-cast alloy forms deep pits due to the continuous dissolution at the second phase-matrix interface,with the average corrosion rate increasing from 0.31 to 0.47 mL/cm2/h.The long-term corrosion rates of FSP-1000-60,FSP-1000-120,and FSP-1200-120 samples are stable at 0.36,0.43,and 0.50 mL/cm2/h,respectively.Research reveals that FSP regulates texture and second phase distribution to achieve synergistic strengthening of alloy strength plasticity,and the homogenization of second phase distribution is a key factor in improving the long-term corrosion resistance of alloys. 展开更多
关键词 Friction stir processing Texture Second phases Mechanical properties Corrosion properties
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Low-Temperature Superplastic Deformation Behavior of Bimodal Microstructure of Friction Stir Processed Ti-6Al-4V Alloy 认领 引用 被引量：2
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作者 H.Q.Dai N.Li +6 位作者 L.H.Wu J.Wang P.Xue F.C.Liu D.R.Ni B.L.Xiao Z.Y.Ma 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2025年第9期1559-1569,共11页
For a long time,the conventional superplastic forming temperature for Ti alloys is generally too high(~900-920℃),which leads to too long production cycles,heavy surface oxidation,and property reduction.In this study,... For a long time,the conventional superplastic forming temperature for Ti alloys is generally too high(~900-920℃),which leads to too long production cycles,heavy surface oxidation,and property reduction.In this study,an ultrafine bimodal microstructure,consisting of ultrafine equiaxed microstructure(0.66μm)and 43.3%lamellar microstructure,was achieved in the Ti-6Al-4V alloy by friction stir processing(FSP).The low-temperature superplastic behavior and deformation mechanism of the FSP Ti-6Al-4V alloy were investigated at temperatures of 550-675℃and strain rates ranging from 1×10−4to 3×10−3s−1.The FSP alloy exhibited superplastic elongations of>200%at the temperature range from 550 to 650℃,and an optimal superplastic elongation of 611%was achieved at 625℃and 1×10−4s−1.This is the first time to report the low-temperature superplasticity of the bimodal microstructure in Ti alloys.Grain boundary sliding was identified as the dominant deformation mechanism,which was effectively accommodated by the comprehensive effect of dislocation-inducedβphase precipitation and dynamic spheroidization of the lamellar structure.This study provides a novel insight into the low-temperature superplastic deformation behavior of the bimodal microstructure. 展开更多
关键词 Titanium alloys Friction stir processing Superplasticity Bimodal microstructure Spheroidization
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A Composite Structure of Al–Mg–Sc Alloy Prepared by Wire Arc‑Directed Energy Deposition with Interlayer Friction Stir Processing 认领 引用 被引量：1
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作者 Y.P.Cui X.P.Guo +4 位作者 P.Xue R.Z.Xu X.M.Guo D.R.Ni Z.Y.Ma 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2025年第10期1794-1808,共15页
Interlayer friction stir processing(FSP)has been proved to be an efective method of enhancing the mechanical properties of wire arc-directed energy deposited(WA-DED)samples.However,the original deposition structure wa... Interlayer friction stir processing(FSP)has been proved to be an efective method of enhancing the mechanical properties of wire arc-directed energy deposited(WA-DED)samples.However,the original deposition structure was still retained in the FSP-WA-DED component besides the processed zone(PZ),thus forming a composite structure.Considering the material utilization and practical service process of the deposited component,more attention should be paid on this special composite structure,but the relevant investigation has not been carried out.In this study,an Al–Mg–Sc alloy was prepared by WA-DED with interlayer FSP treatment,and the composite structure was frstly investigated.Almost all of the pores were eliminated under the pressure efect from the tool shoulder.The grains were further refned with an average size of about 1.2μm in the PZ.Though no severe plastic deformation was involved in the retained WA-DED deposition zone,comparable tensile properties with the PZ sample were obtained in the composite structure.Low ultimate tensile strength(UTS)of 289 MPa and elongation of 3.2%were achieved in the WA-DED sample.After interlayer FSP treatment,the UTS and elongation of the PZ samples were signifcantly increased to 443 MPa and 16.3%,while those in the composite structure remained at relatively high levels of 410 MPa and 13.5%,respectively.Meanwhile,a high fatigue strength of 180 and 130 MPa was obtained in the PZ and composite structure samples,which was clearly higher than that of the WA-DED sample(100 MPa).It is concluded that the defects in traditional WA-DED process can be eliminated in the composite structure after interlayer FSP treatment,resulting in enhanced tensile and fatigue properties,which provides an efective method of improving the mechanical properties of the WA-DED sample. 展开更多
关键词 Wire arc-directed energy deposition Al-Mg-Sc alloys Friction stir processing Composite structure Mechanical property
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Improvement in electromagnetic shielding effectiveness and mechanical properties of ultrafine Mg98.5Zn0.5Y alloy via friction stir processing 认领 引用
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作者 Guangyu Zhang Jialiang Dong +5 位作者 Ziyi Li Zhongxue Feng Jun Tan Xianhua Chen Jianhong Yi Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第9期4395-4411,共17页
A novel Mg98.5Zn0.5Y alloy sheet with ultrafine grains and exceptional electromagnetic shielding performance has been fabricated using friction stir processing(FSP).This study investigates the impact of FSP on t... A novel Mg98.5Zn0.5Y alloy sheet with ultrafine grains and exceptional electromagnetic shielding performance has been fabricated using friction stir processing(FSP).This study investigates the impact of FSP on the microstructure,mechanical properties,and electromagnetic interference(EMI)shielding effectiveness(SE)of the alloy,specifically across three distinct layers within the stir zone(SZ):Top,Middle,and Bottom.The results reveal that the Mg12YZn long-period stacking ordered(LPSO)phase is the predominant structure,undergoing significant grain refinement.The grain size is drastically reduced from 1.5 mm in the as-cast state to 12.6μm,10.0μm,and 7.1μm in the Top,Middle,and Bottom,respectively.This grain refinement and fragmentation of the LPSO phase into nanoscale particles result in a substantial enhancement of mechanical properties.The ultimate tensile strength(UTS)reached 358.2 MPa with an elongation(EL)of 15.1%,reflecting a 344% increase in strength and a 733% improvement in ductility compared to the as-cast material.Simultaneously,the EMI SE was maintained between 70 and 110.4 dB over a broad frequency range(30-4500 MHz).Despite the nanoscale LPSO particles contributing minimally to EMI shielding,the lamellar LPSO structure demonstrated excellent performance through multiple electromagnetic wave reflections within the matrix.These findings underscore the dual benefits of FSP in improving both mechanical strength and electromagnetic shielding effectiveness,positioning this Mg98.5Zn0.5Y alloy for advanced applications in the electronics and telecommunications sectors. 展开更多
关键词 Friction stir processing Mg98.5Zn0.5Y alloy Mechanical properties Electromagnetic shielding
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Tensile Strength and Electrical Conductivity of Carbon Nanotube Reinforced Aluminum Matrix Composites Fabricated by Powder Metallurgy Combined with Friction Stir Processing 认领 引用 被引量：33
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作者 Z.Y.Liu B.L.Xiao +1 位作者 W.G.Wang Z.Y.Ma 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2014年第7期649-655,共7页
A route combining powder metallurgy and subsequent friction stir processing was utilized to fabricate carbon nanotube （CNT） reinforced AI （CNT/AI） and 6061AI （CNT/6061AI） composites. Microstructural observations... A route combining powder metallurgy and subsequent friction stir processing was utilized to fabricate carbon nanotube （CNT） reinforced AI （CNT/AI） and 6061AI （CNT/6061AI） composites. Microstructural observations indicated that CNTs were uniformly dispersed in the matrix in both CNT/AI and CNT/6061AI composites. Mg and Si elements tended to segregate at CNT-AI interfaces in the CNT/6061AI composite during artificial aging treatment. The tensile properties of both the AI and 6061AI were increased by CNT incorporation. The electrical conductivity of CNT/AI was decreased by CNT addition, while CNT/6061AI exhibited an increase in electrical conductivity due to the Mg and Si segregation. 展开更多
关键词 Carbon nanotubes Metal matrix composites Mechanical properties Electrical properties Friction stir processing
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Superplasticity of AZ31 magnesium alloy prepared by friction stir processing 认领 引用 被引量：20
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作者 张大童 熊峰 +2 位作者 张卫文 邱诚 张文 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第9期1911-1916,共6页
Microstructure and tensile behaviors of AZ31 magnesium alloy prepared by friction stir processing（FSP） were investigated.The results show that microstructure of the AZ31 hot-rolled plate with an average grain size o... Microstructure and tensile behaviors of AZ31 magnesium alloy prepared by friction stir processing（FSP） were investigated.The results show that microstructure of the AZ31 hot-rolled plate with an average grain size of 92.0 μm is refined to 11.4 μm after FSP.The FSP AZ31 alloy exhibits excellent plasticity at elevated temperature,with an elongation to failure of 1050% at 723 K and a strain rate of 5×10-4 s-1.The elongation of the FSP material is 268% at 723 K and 1×10-2 s-1,indicating that high strain rate superplasticity could be achieved.On the other hand,the hot-rolled base material,which has a coarse grain structure,possesses no superplasticity under the experimental conditions. 展开更多
关键词 friction stir processing AZ31 magnesium alloy superplasticity microstructure
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Effect of Yttrium Addition on Microstructural Characteristics and Superplastic Behavior of Friction Stir Processed ZK60 Alloy 认领 引用 被引量：13
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作者 Z.A.Luo G.M.Xie +2 位作者 Z.Y.Ma G.L.Wang G.D.Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2013年第12期1116-1122,共7页
As-extruded ZK60 and ZK60-Y magnesium alloy plates were successfully processed via friction stir processing （FSP） at a tool rotation rate of 1600 rain and a traverse speed of 200 mm/min. FSP resulted in the formatio... As-extruded ZK60 and ZK60-Y magnesium alloy plates were successfully processed via friction stir processing （FSP） at a tool rotation rate of 1600 rain and a traverse speed of 200 mm/min. FSP resulted in the formation of equiaxed recrystallized microstructures with the average grain sizes of ,-8.5 and -4.7 μm in the ZK60 and ZK60-Y alloys, respectively. Moreover, FSP broke and dispersed the MgZn2 and W-phase （Mg3Zn3Y2） particles and dissolved MgZn2 phase in the FSP ZK60 alloy. With the addition of rare earth element yttrium （Y） into the ZK60 alloy, the ratio of the high angle grain boundaries （HAGBs） in the FSP alloys increased from 64% to 90%, and a certain amount of twins appeared in the FSP ZK60-Y alloy. The maximum elongation of 1200% and optimum strain rate of 3 X 10-3 s-1 achieved at 450 °C in the FSP ZK60-Y alloy were substantially higher than those of the FSP ZK60 alloy. This is attributed to the fine grains with high ratio of HAGBs and the distribution of a large number of dispersed second phase particles with high thermal stability in the FSP ZK60-Y alloy. Grain boundary sliding was identified as the primary deformation mechanism in the FSP ZK60 and ZK60-Y alloys from the superplastic data analyses and surficial morphology observations. 展开更多
关键词 Magnesium alloy Friction stir processing Rare earth element Microstructure Superplasticity
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