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Achieving ultrahigh-specific strength and enhanced GFA in Ti-based bulk metallic glasses via a two-step alloying strategy 认领 引用
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作者 Heng-Tong Bu Jia-Lun Gu +2 位作者 Yun-Shuai Su Yang Shao Ke-Fu Yao 《Rare Metals》 SCIE EI CAS CSCD 2025年第3期1932-1942,共11页
Ti-based bulk metallic glasses(BMGs)have attracted increasing attention due to their high specific strength.However,a fundamental conflict exists between the specific strength and glass-forming ability(GFA)of Ti-based... Ti-based bulk metallic glasses(BMGs)have attracted increasing attention due to their high specific strength.However,a fundamental conflict exists between the specific strength and glass-forming ability(GFA)of Ti-based BMGs,restricting their commercial applications significantly.In this study,this challenge was addressed by introducing a two-step alloying strategy to mitigate the remarkable density increment effect associated with heavy alloying elements required for enhancing the GFA.Consequently,through two-step alloying with Al and Fe in sequence,simultaneous enhancements in specific strength and GFA were achieved based on a Ti-Zr-Be ternary metallic glass,resulting in the development of a series of centimeter-sized metallic glasses exhibiting ultrahigh-specific strength.Notably,the newly developed(Ti45Zr20Be31Al4)94Fe6alloy established a new record for the specific strength of Ti-based BMGs.Along with a critical diameter(Dc)of 10 mm,it offers the optimal scheme for balancing the specific strength and GFA of Ti-based BMGs.The present results further brighten the application prospects of Ti-based BMGs as lightweight materials. 展开更多
关键词 Ti-based bulk metallic glasses Specific strength Glass-forming ability Two-step alloying strategy
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Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue 认领 引用 被引量：3
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作者 Yun-Shuai SU Shu-Rong YU +1 位作者 Shu-Xin LI Yan-Ni HE 《Frontiers of Mechanical Engineering》 SCIE CSCD 2019年第4期434-441,共8页
Wind turbine gearbox bearings fail with the service life is much shorter than the designed life.Gearbox bearings are subjected to rolling contact fatigue(RCF)and they are observed to fail due to axial cracking,surface... Wind turbine gearbox bearings fail with the service life is much shorter than the designed life.Gearbox bearings are subjected to rolling contact fatigue(RCF)and they are observed to fail due to axial cracking,surface flaking,and the formation of white etching areas(WEAs).The current study reviewed these three typical failure modes.The underlying dominant mechanisms were discussed with emphasis on the formation mechanism of WEAs.Although numerous studies have been carried out,the formation of WEAs remains unclear.The prevailing mechanism of the rubbing of crack faces that generates WEAs was questioned by the authors.WEAs were compared with adiabatic shear bands(ASBs)generated in the high strain rate deformation in terms of microstructural compositions,grain refinement,and formation mechanism.Results indicate that a number of similarities exist between them.However,substantial evidence is required to verify whether or not WEAs and ASBs are the same matters. 展开更多
关键词 rolling contact fatigue(RCF) white etching area(WEA) white etching crack(WEC) adiabatic shear band(ASB)
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