期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到42篇文章
< 1 2 3 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Engineering of enzymatic modules for mRNA manufacturing:Advances in catalytic regulation and process integration 认领 引用
1
作者 Shiyi Che Zhengjun Li +4 位作者 Zhiguo Su Zhikao Li Aibing Yu Minsu Liu Songping Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期92-112,共21页
The clinical efficacy of mRNA-based therapeutics is critically dependent on the structural integrity of the mRNA molecule,which in turn is governed by the efficiency and robustness of its manufacturing process.Unlike ... The clinical efficacy of mRNA-based therapeutics is critically dependent on the structural integrity of the mRNA molecule,which in turn is governed by the efficiency and robustness of its manufacturing process.Unlike conventional small-molecule synthesis,mRNA manufacturing relies on complex enzymatic cascades involving biomacromolecules with dynamic conformations as templates,intermediates,and catalysts.Key enzymatic modules,including plasmid linearization for DNA template preparation(Module 1),in vitro transcription(IVT)synthesis(Module 2),capping modification(Module 3)of mRNA,and different nucleases-aided removal of impurities(Module 4),are highly interdependent,each with specific catalytic enzymes and auxiliary cofactors.These modules present major engineering challenges of low efficiency and lack of modular compatibility across the multi-step enzymatic processes.Moreover,traditional approaches such as multienzyme immobilization or compartmentalization often fail to meet the demands of high-throughput,continuous and scalable manufacturing.This review systematically summarizes recent advances in the engineering of enzymatic modules for mRNA manufacturing,emphasizing challenges in catalytic regulation,module integration and process intensification.The potential strategies for improving reaction compatibility and enabling process integration and intensification are discussed,providing insights into future directions for engineering mRNA synthesis at scale. 展开更多
关键词 mRNA manufacturing Enzymatic modules Catalytic regulation Process integration Multienzyme reaction
暂未订购 下载PDF
Architecting new materials with strength-ductility synergy through interphase engineering 认领 引用
2
作者 Zhenbo Zhang Emmanouil Stavroulakis +1 位作者 David Stewart Michael Preuss 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期225-232,共8页
Conventional strategies to strengthen alloys are usually accompanied by drastic sacrifice in ductility,which is known as the strength-ductility trade-off.New metallurgical processing approaches are required to defeat ... Conventional strategies to strengthen alloys are usually accompanied by drastic sacrifice in ductility,which is known as the strength-ductility trade-off.New metallurgical processing approaches are required to defeat this longstanding dilemma.Here we report a novel solid-state powder manufacturing route to overcome this challenge enabling the architecting of a complex multiphase constituent composite using readily available metal powder as a feedstock.The materials design philosophy is successfully verified in a system mixing conventional austenitic stainless steel and ferritic steel powder and consolidating it by hot isostatic pressing.Significant strengthening and work hardenability are achieved at no expense of ductility compared to the ferrite and austenite on their own.Such extraordinary strength-ductility synergy is attributed to the well-architected compositional gradients across different phases resulting in soft and hard regions at the scale of the original powder without sharp interfaces.Accordingly,plasticity progresses from soft to hard regions during mechanical loading,which is the key to mitigating the deformation incompatibility and enabling remarkable ductility.Our study provides a new concept for materials design with synergistic properties that used to be trade-offs in conventional materials,which is applicable to a broad range of material systems with unprecedented multifunctionality. 展开更多
关键词 Materials architecting Multiphase alloy Ductility Gradient structure
暂未订购 下载PDF
Synergistic p-doping and interface passivation of P3HT by oxidized organic small molecules toward efficient and stable perovskite solar modules 认领 引用
3
作者 Pin Lv Yuxi Zhang +9 位作者 Wen Liang Tan Junye Pan Yanqing Zhu Jiahui Chen Bingxin Duan Peiran Hou Min Hu Christopher R.Mc Neill Jianfeng Lu Yi-Bing Cheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第9期477-484,I0013,共8页
Poly(3-hexylthiophene)(P3HT)is one of the most promising hole-transporting materials in the pursuit of efficient and stable perovskite solar cells due to its outstanding stability and low cost.However,the intrinsic lo... Poly(3-hexylthiophene)(P3HT)is one of the most promising hole-transporting materials in the pursuit of efficient and stable perovskite solar cells due to its outstanding stability and low cost.However,the intrinsic low carrier density of P3 HT and poor contact between the P3HT/perovskite interface always lead to a low performance of the solar cell,while conventional chemical doping always makes the films unstable and limits the scalability.In this work,for the first time,we simultaneously enhanced the hole transporting properties of P3HT film and the interface of perovskite by doping it with a judiciously designed oxidized small molecule organic semiconductor.The organic salt not only can promote the lamellar crystallinity of P3HT to obtain better charge transport properties,but also reduce the defects of perovskite.As a result,we achieved champion efficiencies of 23.0%for small-area solar cells and 18.8%for larger-area modules(48.0 cm2).This efficiency is the highest value for P3HT-based perovskite modules.Moreover,the solar cells show excellent operational stability,retaining over 95%of their initial efficiencies after1200 h of continuous operation. 展开更多
关键词 P3HT doping Perovskite solar cells Perovskite solar modules Small molecule organic semiconductor Interface passivation
暂未订购 下载PDF
cardiGAN:A generative adversarial network model for design and discovery of multi principal element alloys 认领 引用 被引量：11
4
作者 Z.Li W.T.Nash +3 位作者 S.P.O’Brien Y.Qiu R.K.Gupta N.Birbilis 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第30期81-96,共16页
Multi-principal element alloys(MPEAs),inclusive of high entropy alloys(HEAs),continue to attract significant research attention owing to their potentially desirable properties.Although MPEAs remain under extensive res... Multi-principal element alloys(MPEAs),inclusive of high entropy alloys(HEAs),continue to attract significant research attention owing to their potentially desirable properties.Although MPEAs remain under extensive research,traditional(i.e.empirical)alloy production and testing are both costly and timeconsuming,partly due to the inefficiency of the early discovery process which involves experiments on a large number of alloy compositions.It is intuitive to apply machine learning in the discovery of this novel class of materials,of which only a small number of potential alloys have been probed to date.In this work,a proof-of-concept is proposed,combining generative adversarial networks(GANs)with discriminative neural networks(NNs),to accelerate the exploration of novel MPEAs.By applying the GAN model herein,it was possible to directly generate novel compositions for MPEAs,and to predict their phases.To verify the predictability of the model,alloys designed by the model are presented and a candidate produced-as validation.This suggests that the model herein offers an approach that can significantly enhance the capacity and efficiency of development of novel MPEAs. 展开更多
关键词 Alloy design Machine learning Generative adversarial network Neural network Multi-principal element alloy High entropy alloys
暂未订购 下载PDF
Unravelling the competitive effect of microstructural features on the fracture toughness and tensile properties of near beta titanium alloys 认领 引用 被引量：12
5
作者 Yang Liu Samuel C.V.Lim +2 位作者 Chen Ding Aijun Huang Matthew Weyland 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第2期101-112,共12页
The competitive effect of microstructural features including primaryα(αp),secondaryα(αs),grain boundaryα(αGB) and β grain size on mechanical properties of a near β Ti alloy were studied with two heat ... The competitive effect of microstructural features including primaryα(αp),secondaryα(αs),grain boundaryα(αGB) and β grain size on mechanical properties of a near β Ti alloy were studied with two heat treatment processes.The relative effect of β grain size and STA(solution treatment and ageing)processing parameters on mechanical properties were quantitatively explored by the application of Taguchi method.These results were further explained via correlating microstructure with the fracture toughness and tensile properties.It was found that large numbers of fine as precipitates and continuous αs played greater roles than other features,resulting in a high strength and very low ductility(<2%)of STA process samples.The β grain size had a negative correlation with fracture toughness.In the samples prepared by BASCA( β anneal slow cooling and ageing)process,improved ductility and fracture toughness were obtained due to a lower density ofα;precipitates,a basket-weave structure and zigzag morphology of αGB.For this heat treatment,an increase in prior β grain size had an observable positive effect on fracture toughness.The contradictory effect of β grain size on fracture toughness found in literature was for the first time explained.It was shown that the microstructure obtained from different processes after β solution has complex effect on mechanical properties.This complexity derived from the competition between microstructure features and the overall sum of their effect on fracture toughness and tensile properties.A novel table was proposed to quasi-quantitatively unravel these competitive effects. 展开更多
关键词 Nearβtitanium alloys Microstructural features Competitive effect Fracture toughness βgrain size effect
暂未订购 下载PDF
Effects of direct aging treatment on microstructure,mechanical properties and residual stress of selective laser melted AlSi10Mg alloy 认领 引用 被引量：12
6
作者 Huaping Tang Chaofeng Gao +5 位作者 Yong Zhang Nannan Zhang Chuan Lei Yunjie Bi Ping Tang Jeremy Heng Rao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第8期198-209,共12页
Direct aging treatment is an important post-processing procedure,yet little research has been done on how it balances the mechanical properties and the stress removal for selective laser melted(SLMed)AlSi10Mg alloys.H... Direct aging treatment is an important post-processing procedure,yet little research has been done on how it balances the mechanical properties and the stress removal for selective laser melted(SLMed)AlSi10Mg alloys.Here,we proposed a typical direct aging treatment on SLMed AlSi10Mg alloys,and studied the effects on their microstructure,properties and residual stress evolution.The results indi-cate that the as-built microstructure is mainly composed of fine cellularα-Al and reticulated Si phases,and some pre-existing precipitates and dislocations are found in these cells.The direct aging treatment promotes the precipitation of nano-scaled Si phases and preserves a network-like Si structure.Therefore,the strength of the peak-aged alloy increases while the ductility decreases.As the aging temperature in-creases from 160 to 200℃,aging hardening behavior was accelerated significantly.Aging at 160℃ for 4-9 h removes 32.0%-43.0%of the residual stress,which is attributed to the decomposition of the su-persaturatedα-Al matrix,the precipitation of the nano-Si phase and the exposure of low-angle grain boundaries(LAGBs).Considering the overal alloy performance obtained,over-aging at 160℃ for 4 h is the optimized heat treatment regime.Under this condition,the yield strength(YS),ultimate tensile strength(UTS)and elongation(EL)of the alloy in the transverse and longitudinal direction are 309.5 MPa,464.4 MPa and 8.3%and 286.4 MPa,464.9 MPa and 5.1%,respectively. 展开更多
关键词 Selective laser melting AlSi10Mg alloys Direct aging treatment Residual stress removal
暂未订购 下载PDF
Impact of severe plastic deformation on kinetics and thermodynamics of hydrogen storage in magnesium and its alloys 认领 引用 被引量：12
7
作者 Kaveh Edalati Etsuo Akiba +10 位作者 Walter J.Botta Yuri Estrin Ricardo Floriano Daniel Fruchart Thierry Grosdidier Zenji Horita Jacques Huot Hai-Wen Li Huai-Jun Lin Ádám Révész Michael J.Zehetbauer 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第15期221-239,共19页
Magnesium and its alloys are the most investigated materials for solid-state hydrogen storage in the form of metal hydrides,but there are still unresolved problems with the kinetics and thermodynamics of hydrogenation... Magnesium and its alloys are the most investigated materials for solid-state hydrogen storage in the form of metal hydrides,but there are still unresolved problems with the kinetics and thermodynamics of hydrogenation and dehydrogenation of this group of materials.Severe plastic deformation(SPD)methods,such as equal-channel angular pressing(ECAP),high-pressure torsion(HPT),intensive rolling,and fast forging,have been widely used to enhance the activation,air resistance,and hydrogenation/dehydrogenation kinetics of Mg-based hydrogen storage materials by introducing ultrafineanoscale grains and crystal lattice defects.These severely deformed materials,particularly in the presence of alloying additives or second-phase nanoparticles,can show not only fast hydrogen absorption/desorption kinetics but also good cycling stability.It was shown that some materials that are apparently inert to hydrogen can absorb hydrogen after SPD processing.Moreover,the SPD methods were effectively used for hydrogen binding-energy engineering and synthesizing new magnesium alloys with low thermodynamic stability for reversible lowoom-temperature hydrogen storage,such as nanoglasses,high-entropy alloys,and metastable phases including the high-pressureγ-MgH2 polymorph.This work reviews recent advances in the development of Mg-based hydrogen storage materials by SPD processing and discusses their potential in future applications. 展开更多
关键词 Severe plastic deformation(SPD) Nanostructured materials Ultrafine-grained(UFG)materials Magnesium hydride(MgH2) Magnesium-based alloys Hydrogen absorption Hydrogenation kinetics Hydrogen storage thermodynamics
暂未订购 下载PDF
Effect of platform temperature on microstructure and corrosion resistance of selective laser melted Al-Mg-Sc alloy plate 认领 引用 被引量：4
8
作者 LI Meng-jia LIAN Juan +4 位作者 CAO Ling-fei SHI Yun-jia ZHANG Guo-peng WANG Jie-fang ROMETSCH Paul 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第3期999-1014,共16页
The Al-3.40Mg-1.08Sc alloy plates were manufactured by selective laser melting(SLM) at platform temperatures of 35 ℃ and 200 ℃, respectively, and the corrosion performance of them was studied along height direction.... The Al-3.40Mg-1.08Sc alloy plates were manufactured by selective laser melting(SLM) at platform temperatures of 35 ℃ and 200 ℃, respectively, and the corrosion performance of them was studied along height direction. The results show that the corrosion resistance of the alloy plate built at platform temperature of 35 ℃ along height direction is basically the same due to a uniform microstructure;While the corrosion resistance of the alloy plate built at platform temperature of 200 ℃ along height direction is different. The evolution of microstructure and the distribution of secondary phases are investigated, and the results show that the Cu-rich phases in alloy play a key role on corrosion performance. At higher platform temperature, the cooling rate is relative slow and a certain degree of in situ ageing leads to the significantly different distribution of Cu-rich phases along grain boundary. Specimens built at the platform temperature of 200 ℃ are inclined to locate at the crossed grain boundary, rather than continuous segregation of Cu-rich phases along grain boundary that is built at platform temperature of 35 ℃. Therefore, the corrosion resistance of Al-3.40Mg-1.08Sc alloy plate manufactured at platform temperature of 200 ℃ is higher, and presents a gradually decreasing trend along height direction. 展开更多
关键词 selective laser melting aluminum alloys microstructure corrosion resistance platform temperature
暂未订购 下载PDF
Structure,mechanical characteristics,biodegradation,and in vitro cytotoxicity of magnesium alloy ZX11 processed by rotary swaging 认领 引用 被引量：1
9
作者 Natalia Martynenko Natalia Anisimova +9 位作者 Mikhail Kiselevskiy Natalia Tabachkova Diana Temralieva Dmitry Prosvirninb Vladimir Terentiev Andrey Koltygina Vladimir Belov Mikhail Morosov Vladimir Yusupov Sergey Dobatkina 《Journal of Magnesium and Alloys》 SCIE EI CAS 2020年第4期1038-1046,共9页
Rotary swaging(RS)of alloy Mg-1.03Zn-0.66Ca(ZX11)was shown to refine the average grain size to 4.5±1.2μm in a longitudinal section and 4.8±0.9μm in a transverse section.In addition,a small amount of Mg2Ca ... Rotary swaging(RS)of alloy Mg-1.03Zn-0.66Ca(ZX11)was shown to refine the average grain size to 4.5±1.2μm in a longitudinal section and 4.8±0.9μm in a transverse section.In addition,a small amount of Mg2Ca particles about 300nm in size and Mg6Zn3Ca2 particles with a size of about lOOnm was detected.This resulted in pronounced strengthening:the yield strength and the ultimate tensile strength rose to 210±8 MPa and 276±6 MPa,respectively,while the elongation hardly decreased(22.0±1.8%and 18.3±2.9%before and after RS).Furthermore,RS led to an increase in the fatigue limit of the alloy from 120 MPa to 135 MPa and did not impair its resistance to chemical corrosion.The studies in vitro showed that ZX11 induces hemolysis without inhibiting the viability of peripheral blood mononuclear cells and has a more pronounced cytotoxic effect on tumor cells in comparison with non-transformed cells.No significant difference of the latter effect between the initial and the deformed states was observed. 展开更多
关键词 Magnesium alloy Rotary swaging Mechanical characteristics Hemolysis Cell viability Cytotoxicity
暂未订购 下载PDF
Achieving quadruple performance enhancement in biodegradable Zn-Fe alloys via accumulative cooling and interface fusion(ACIF) 认领 引用
10
作者 Wei Gou Qiang Wang +5 位作者 Zhang-Zhi Shi Yuman Zhu Jia-You Zhang Shan-Peng Zhao Hai-Jun Zhang Lu-Ning Wang 《Rare Metals》 SCIE EI CAS CSCD 2025年第12期10887-10900,共14页
Theoretically,cooling rate decreases exponentially as solidification thickness increases.This leads to coarse second-phase particles in Zn alloys,which not only impairs mechanical properties but also exacerbates degra... Theoretically,cooling rate decreases exponentially as solidification thickness increases.This leads to coarse second-phase particles in Zn alloys,which not only impairs mechanical properties but also exacerbates degradation nonuniformity.To address this common issue,we have developed accumulative-cooling and interface-fusion(ACIF) technology that maintains a high cooling rate regardless of increased solidification thickness.Using Zn-0.4Fe as a model alloy,the accumulative-cooling process achieves an average cooling rate of 817℃ min-1,approximately 68 times that of air cooling.After extrusion,the average size of FeZn13 particles is refined from 29.4 to 0.4 μm,reaching the highest level of refinement in Zn alloys.As a result,a quadruple enhancement of Zn-0.4Fe model alloy has been achieved:Ultimate tensile strength enhanced 1.6-fold to 265 MPa(the highest among Zn-Fe alloys),elongation enhanced from 29% to 48%,corrosion uniformity improved 3 times,and cell viability of mouse embryonic osteoblast precursor cells(MC3T3-E1)increased by 20%.A long rod is obtained via ACIF,overcoming the limitation that fast-cooled Zn alloys could only be produced in thin plate form.This enables the possibility of fabricating bone screws and vascular stents using bulk Zn alloys with fine second-phase particles.From a technical standpoint,this technique can be widely applied to a variety of metallic materials. 展开更多
关键词 Biodegradable Zn alloys Microstructure refinement Mechanical properties Corrosion uniformity Cell viability
暂未订购 下载PDF
An explicit formulation of the macroscopic strength criterion for porous media with pressure and Lode angle dependent matrix under axisymmetric loading 认领 引用 被引量：1
11
作者 Jincheng Fan Laurence Brassart +1 位作者 Wanqing Shen Xiurun Ge 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2021年第4期820-832,共13页
This paper aims to propose an explicit formulation of the macroscopic strength criterion for porous media with spherical voids.The matrix is assumed rigid and perfectly plastic with yield surface described by the thre... This paper aims to propose an explicit formulation of the macroscopic strength criterion for porous media with spherical voids.The matrix is assumed rigid and perfectly plastic with yield surface described by the three-parameter strength criterion,which is Lode angle and pressure dependent and capable of accounting for distinct values of the uniaxial tensile strength,uniaxial compressive strength(UCS)and equal biaxial compressive strength(eBCS).An exact upper bound of the macroscopic strength is derived for porous media subjected to purely hydrostatic loading.Besides,an estimate of the macroscopic strength profile of porous media under axisymmetric loading is obtained in parametric form.Moreover,a heuristic strength criterion in explicit form is further developed by examining limit cases of the parametric strength criterion.The developed strength criteria are assessed by finite-element based numerical solutions.Compared with the parametric strength criterion which involves cumbersome functions,the heuristic one is convenient for practical applications.For specific values of the matrix’s strength surface,the proposed heuristic strength criterion can recover the well-known Gurson criterion.The present work also addresses the effect of the ratio of matrix’s eBCS to UCS on the macroscopic strength of porous media.For matrix with distinct values of eBCS and UCS,neglecting the difference between eBCS and UCS would result in an underestimation of the macroscopic strength,especially when the pressure is large. 展开更多
关键词 Porous materials Unified strength criterion Homogenization Gurson criterion
暂未订购 下载PDF
Review of additively manufactured zinc alloys by laser powder bed fusion for biomedical applications 认领 引用
12
作者 Xuan Yang Zaimao Peng +3 位作者 Yan Fang Yunlong Tang Hsin-Hui Shen Yuman Zhu 《Rare Metals》 SCIE EI CAS CSCD 2025年第11期8262-8291,共30页
Zinc(Zn)and its alloys have emerged as promising candidates for biomedical materials,owing to their controlled degradation kinetics,intrinsic biocompatibility,and the release Zn2+ions which are known to promote bon... Zinc(Zn)and its alloys have emerged as promising candidates for biomedical materials,owing to their controlled degradation kinetics,intrinsic biocompatibility,and the release Zn2+ions which are known to promote bone regeneration and tissue healing.Despite their potential,the widespread clinical adoption of Zn alloys has been hindered by insufficient mechanical properties,design limitations of traditional manufacturing,and limited clinical validation.Recent advances in additive manufacturing(AM),particularly laser powder bed fusion(LPBF),are revolutionizing the production of Zn alloy implants.LPBF enables unprecedented design freedom and accuracy,allowing the fabrication of patient-specific,geometric allyintricate and porous structures with unique functionality that are previously unattainable.This review aims to provide a comprehensive overview of the latest progress in LPBF processing of Zn alloys,focusing on structure design,fabrication,micro structural characteristics,and mechanical and biological properties—critical factors for real applications of functional implants,particularly in cardiovascular and orthopedic fields.Additionally,this review examines the role of post-processing treatments,such as heat treatments and surface modifications,in adjusting degradation rate,controlling Zn2+ion release,and improving cell viability,proliferation and differentiation,all of which are vital for achieving predictable and reliable in vivo outcomes.Further,the review seeks to synthesize these advances and their interplays to provide a strategic insight for translating patient-specific,biodegradable Zn implants into clinical practice. 展开更多
关键词 Zn alloys Additive manufacturing Design Fabrication Performance
暂未订购 下载PDF
Simultaneous enhancement of mechanical and fatigue properties in 2xxx aluminum alloys via microstructural uniformity induced by cyclic plasticity 认领 引用 被引量：1
13
作者 Yong Zhang Baishan Gong +7 位作者 Zhixin Ba Lantian Zhang Le Zong Lu Jiang Yuman Zhu Wenfeng Yang Zhihong Jia Wenwen Sun 《Science China Materials》 SCIE EI CAS CSCD 2026年第4期2133-2141,共9页
The 2xxx(Al-Cu-Mg)alloy is widely used in transportation fields due to its excellent strength-to-weight ratio.However,conventional heat treatments such as peak aging(PA)often result in a pronounced strength-ductility ... The 2xxx(Al-Cu-Mg)alloy is widely used in transportation fields due to its excellent strength-to-weight ratio.However,conventional heat treatments such as peak aging(PA)often result in a pronounced strength-ductility trade-off and limited fatigue resistance.To address these limitations,this work presents a comprehensive study on the mechanical properties and fatigue behavior of Al-Cu-Mg alloy subjected to a cyclic plasticity treatment.The cyclic strengthened(CS)samples exhibit a well-balanced combination of strength and ductility due to the formation of nanoscale solute clusters.A systematic and quantitative analysis of the strengthening mechanisms is performed to evaluate the contributions of key microstructural features to the mechanical response.Moreover,the CS samples also demonstrate a significantly higher fatigue ratio and fatigue strength compared to the PA sample,despite exhibiting comparable tensile strength.These improvements are attributed to the absence of weak precipitate-free zones(PFZs)induced as a result of cyclic plasticity,which completely eliminates the pronounced strength differential between the grain interiors and the PFZs observed in the PA state.This microstructural uniformity effectively suppresses strain localization under cyclic loading,promotes a more homogeneous strain partitioning,and consequently delays fatigue crack initiation.These findings highlight cyclic plasticity treatment as a promising microstructure design strategy for simultaneously enhancing the mechanical and fatigue properties of high-strength Al alloys. 展开更多
关键词 Al alloys mechanical properties high-cycle fatigue precipitate-free zones solute clusters
暂未订购 下载PDF
Fine equiaxed β grains and superior tensile property in Ti-6Al-4V alloy deposited by coaxial electron beam wire feeding additive manufacturing 认领 引用 被引量：10
14
作者 Jiahua Zhang Yi Yang +8 位作者 Sheng Cao Zhiqiang Cao Dmytro Kovalchuk Songquan Wu Enquan Liang Xi Zhang Wei Chen Fan Wu Aijun Huang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2020年第10期1311-1320,共10页
Coarse columnar β grains result in anisotropic mechanical properties in Ti alloys deposited by additive manufacturing. This study reports that Ti-6Al-4V alloy fabricated by coaxial electron beam wire feeding additive... Coarse columnar β grains result in anisotropic mechanical properties in Ti alloys deposited by additive manufacturing. This study reports that Ti-6Al-4V alloy fabricated by coaxial electron beam wire feeding additive manufacturing presents a weak anisotropy, high strength and ductility. The superior tensile property arises from a microstructure with fine equiaxed β grains(EGβ), discontinuous grain boundary α phase and short intragranular α lamellae. A large region of fine EGβ arises from a special combination of the temperature gradient and solidification rate, and attractive α morphology is caused by solid phase transformations during interpass thermal cycling and post heat treatments. 展开更多
关键词 Directed energy deposition Wire feeding additive manufacturing Ti–6Al–4V alloy Equiaxedβgrain Tensile properties
暂未订购 下载PDF
MXenes induce epitaxial growth of size-controlled noble nanometals:A case study for surface enhanced Raman scattering(SERS) 认领 引用 被引量：7
15
作者 Renfei Cheng Tao Hu +11 位作者 Minmin Hu Changji Li Yan Liang Zuohua Wang Hui Zhang Muchan Li Hailong Wang Hongxia Lu Yunyi Fu Hongwang Zhang Quan-Hong Yang Xiaohui Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第5期119-127,共9页
Noble nanometals are of significance in both scientific interest and technological applications,which are usually obtained by conventional wet-chemical synthesis.Organic surfactants are always used in the synthesis to... Noble nanometals are of significance in both scientific interest and technological applications,which are usually obtained by conventional wet-chemical synthesis.Organic surfactants are always used in the synthesis to prevent unexpected overgrowth and aggregation of noble nanometals.However,the surfactants are hard to remove and may interfere with plasmonic and catalytic studies,remaining surfactant-free synthesis of noble nanometals a challenge.Herein,we report an approach to epitaxial growth of sizecontrolled noble nanometals on MXenes.As piloted by density functional theory calculations,along with work function experimental determination,kinetic and spectroscopic studies,epitaxial growth of noble nanometals is initiated via a mechanism that involves an in situ redox reaction.In the redox,MXenes as two-dimensional solid reductants whose work functions are compatible with the reduction potentials of noble metal cations,enable spontaneous donation of electrons from the MXenes to noble metal cations and reduce the cations into nanoscale metallic metals on the outmost surface of MXenes.Neither surfactants nor external reductants are used during the whole synthesis process,which addresses a long-standing interference issue of surfactant and external reductant in the conventional wet-chemical synthesis.Moreover,the MXenes induced noble nanometals are size-controlled.Impressively,noble nanometals firmly anchored on MXenes exhibit excellent performance towards surface enhanced Raman scattering.Our developed strategy will promote the nanostructure-controlled synthesis of noble nanometals,offering new opportunities to further improve advanced functional properties towards practical applications. 展开更多
关键词 Two-dimensional materials MXene In situ redox Noble metal SERS
暂未订购 下载PDF
The latest development of Sc-strengthened aluminum alloys by laser powder bed fusion 认领 引用 被引量：6
16
作者 Dina Bayoumy Wenhao Kan +2 位作者 Xinhua Wu Yuman Zhu Aijun Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第18期1-17,共17页
Laser powder bed fusion(LPBF)is one of the typical additive manufacturing techniques that enables the fabrication of complex-shaped structures with great freedom of design.Due to the challenges encoun-tered in LPBF pr... Laser powder bed fusion(LPBF)is one of the typical additive manufacturing techniques that enables the fabrication of complex-shaped structures with great freedom of design.Due to the challenges encoun-tered in LPBF processing of Al alloys,most studies have focused on AlSi alloys which are much easier to process but are not inherently designed for high-strength applications.In recent years,however,signif-icant progress has been made to develop Sc-containing Al alloys that are designed specifically for LPBF production.These alloys display excellent processability and superior mechanical properties that open up a range of possible applications in industries that require high specific strength,good thermal stability,and increased functionality.As such,this paper reviews the available literature on how Sc additions in-fluence the microstructure and properties of Al alloys when processed via LPBF and thus,aims to shed light on the considerations that have been made to achieve remarkable material consolidation alongside excellent mechanical properties,with the latter achieved through a high degree of Sc supersaturation and a great potential for nanoprecipitation. 展开更多
关键词 Aluminum alloys Scandium Additive manufacturing Laser powder bed fusion Mechanical property Microstructure
暂未订购 下载PDF
Towards creep property improvement of selective laser melted Ni-based superalloy IN738LC 认领 引用 被引量：8
17
作者 H.Y.Song M.C.Lam +5 位作者 Y.Chen S.Wu P.D.Hodgson X.H.Wu Y.M.Zhu A.J.Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第17期301-314,共14页
Nickel-based superalloy IN738LC produced by selective laser melting(SLM)exhibits inferior hightemperature creep properties than its cast counterparts due to relatively smaller grain size,particularly for the plane nor... Nickel-based superalloy IN738LC produced by selective laser melting(SLM)exhibits inferior hightemperature creep properties than its cast counterparts due to relatively smaller grain size,particularly for the plane normal to the building direction.This work studied effects of post heating strategy on the microstructure and especially the grain size to improve the high temperature creep resistance.The asbuilt microstructure exhibited a fine grain size and large quantities of MC carbides that could effectively hinder grain growth.It was found that unconventional two-step heat treatments could lead to substantial grain growth,and the effect is particularly prominent at a specific temperature.The ease of grain growth was explained after classifying the microstructural evolution(boundary carbide transformation)during each heating step and related to the reduced grain boundary pinning force from MC carbides.Creep tests validated the effect of the new heat treatment scheme on the SLM-processed IN738LC at 850℃.An extended creep fracture life(1.5 to 4 times improvement)and lower secondary creep rates were achieved with samples subjected to the newly optimized two-step heat treatment.The complete creep curves are also firstly presented for SLM-IN738LC,confirming the effectiveness of grain growth and highlighting the importance of dedicated heat treatment for SLM superalloys. 展开更多
关键词 Selective laser melting IN738LC alloy Creep properties Heat treatments Grain structure
暂未订购 下载PDF
Origin of non-uniform plasticity in a high-strength Al-Mn-Sc based alloy produced by laser powder bed fusion 认领 引用 被引量：4
18
作者 Dina Bayoumy Kwangsik Kwak +8 位作者 Torben Boll Stefan Dietrich Daniel Schliephake Jie Huang Junlan Yi Kazuki Takashima Xinhua Wu Yuman Zhu Aijun Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第8期121-133,共13页
The Al-Mn-Sc-based alloys specific for additive manufacturing(AM)have been recently developed and can reach ultrahigh strength and adequate elongation.However,these alloys commonly exhibit nonuniform plasticity during... The Al-Mn-Sc-based alloys specific for additive manufacturing(AM)have been recently developed and can reach ultrahigh strength and adequate elongation.However,these alloys commonly exhibit nonuniform plasticity during tensile deformation,which is a critical issue hindering their wider application.In this work,the origin of this non-uniform plasticity of the alloys produced by laser powder bed fusion(LPBF)has been systematically investigated for the first time.The results show that the loss of uniform plasticity in the alloy originates from microstructural regions containing equiaxed fine-grains(FGs)(~650nm in size)at the bottom of the melt pools.In micro-tensile tests,the strength of these FG regions can reach a peak of~630 MPa.After this,an apparent yield drop occurs,followed by rapid strain softening.This FG behavior is associated with intermetallic particles along grain boundaries and a lack of uniform mobile dislocations during deformation.The columnar coarse-grain(CG)regions in the remaining melt pools show uniform plasticity and moderate work hardening.Furthermore,the quantitative calculations indicate that the solid solution strengthening in these two regions is similar.Nevertheless,secondary Al3Sc precipitates contribute to~260 MPa strength in the FG,compared to 310 MPa in the CG due to their different number density.In addition,grain boundary strengthening can reach 230 MPa in the FG region;nearly double the CG region value. 展开更多
关键词 Aluminium alloy Laser powder bed fusion Crystal plasticity Microstructures Strengthening
暂未订购 下载PDF
Precipitation evolution of Al-Zn-Mg-Cu-(Ag) alloys with a low Zn/Mg ratio 认领 引用 被引量：3
19
作者 Qianqian Zhu Xiaodong Wu +5 位作者 Lingfei Cao Yan Zou Hui Song Yahui Liu Kexing Song Malcolm J.Couper 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第28期177-196,共20页
The influence of minor Ag on the precipitation evolution of the Al-4.2Zn-2.8Mg-1.0Cu(wt.%)alloy from early stages to over-aged stages at 150°C was investigated.Surprisingly,co-precipitation of strengthening phase... The influence of minor Ag on the precipitation evolution of the Al-4.2Zn-2.8Mg-1.0Cu(wt.%)alloy from early stages to over-aged stages at 150°C was investigated.Surprisingly,co-precipitation of strengthening phases T′andη′are found in both Ag-free and Ag-added alloys.With Ag addition,precipitation of both T′andη′is refined and increased,such that the age-hardening capabilities and peak-aged tensile strength are improved.In addition,the quantitative proportion ofη′precipitates increases with the increase of Ag content due to the increase in the(Zn+Cu)/Mg ratio of nucleating particles.The narrowed precipitate-free zones(PFZs)are considered responsible for the undiminished fracture elongation in Ag-added alloys.Essentially,these effects of Ag are closely related to the strong Ag-vacancy and Ag-solute interactions.In over-aged stages,the Ag-added alloys still possess higher hardness values compared to the Ag-free alloy,which is related to precipitate coarsening mechanisms.The Ag-free alloy follows classical coarsening behavior by solid solution mediated diffusion,while the Ag-added alloy follows two possible coarsening mechanisms,coalescence of aggregates and diffusion of atoms.The smaller average size and higher residual number density of precipitates benefited from the slow diffusion-controlled coarsening behavior depending on the precipitate composition characteristics of the two-stage differentiation and the precipitate distribution characteristics of high-density dispersion in early-aged stages could explain why the hardness of Ag-added alloy keeps at a higher level than that of Ag-free alloy even after 1000 h ageing.Meanwhile,the transformation of metastable phases to stable phases is inhibited due to the addition of Ag,such that GP zones,T′,η′,ηand T phases coexist even after 14 d of ageing.In terms of phase composition,the addition of Ag decreases the ratio of Mg/(Al+Zn)in T-type phase.For the Ag-added alloy,the sum concentration of Zn+Mg inη′phase is about 10 at.%higher compared to T′phase,andηphase continues to have a high sum concentration of Zn+Mg,besides,the Zn/Mg ratio and Cu concentration exhibit obvious differences from T phase. 展开更多
关键词 Al-Zn-Mg-Cu alloy with low Zn/Mg Trace Ag Co-precipitation Evolution of precipitation Atom probe tomography
暂未订购 下载PDF
{332}<113> Twinning transfer behavior and its effect on the twin shape in a beta-type Ti-23.1Nb-2.0Zr-1.0O alloy 认领 引用 被引量：1
20
作者 Yi Yang Bohua Zhang +11 位作者 Zhichao Meng Lei Qu Hao Wang Sheng Cao Jianan Hu Hao Chen Songquan Wu Dehai Ping Geping Li Lai-Chang Zhang Rui Yang Aijun Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第32期58-66,共9页
The interaction between twins and grain boundaries(GB) has an important influence on the deformation and fracture behavior of materials. In the present work, {332} twinning transfer(TT) behavior and its effect on the ... The interaction between twins and grain boundaries(GB) has an important influence on the deformation and fracture behavior of materials. In the present work, {332} twinning transfer(TT) behavior and its effect on the twin shape in a deformed β-type Ti-23.1 Nb-2.0 Zr-1.0 O Ti alloy were investigated experimentally and with molecular dynamics simulation. The crystallographic alignment factor of the two twinning systems in the neighboring grains and the misorientation angle of the grain pairs were found to influence the occurrence of TT. This further determines the twin shape: twins present a ruler shape when TT occurs but are in a lenticular shape otherwise. Such different twin shapes are attributed to the local stress states related to TT occurring or not. Both ruler-shaped paired twinning and lenticular twinning would provide effective mechanisms to release or reduce the stress concentration in front of the twin tips in different grain pairs. 展开更多
关键词 Titanium alloys Plastic deformation Grain boundaries Twinning Twin shape
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 3 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈