Effects of cooling rates on the mechanical properties of a Ti-based bulk metallic glass

查看全文 作　　者：XIAO YueHua, WU Yuan, LIU ZhiYuan, WU HongHui & Lü ZhaoPing State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2010年第53卷第3期,共5页

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50725104);the National Basic Research Program of China (Grant No. 2007CB613903);the Program of Introducing Talents of Discipline to Universities (Grant No. B07003) 摘　　要：Mechanical properties of the glassy specimens fabricated at different cooling rates with a composition of Ti40Zr25Cu12Ni3Be20 were systematically investigated. It was confirmed that faster cooling rates caused not only a larger amount of frozen-in free volume but also a higher glass transition temperature in the bulk glassy alloy. Increase in the free volume was found to favor plastic deformation and then to give rise to larger compressive plasticity, whilst the rise in the glass transition temperature seemed to be closely related to the higher yield strength. Moreover, the increase of yield strength and plasticity induced by fast cooling rates may also be associated with the residual stress generated during the fabrication process. Our results suggest that the deformation behavior of bulk metallic glasses is sensitive to various factors and influences from the other factors should be excluded as far as cooling-rate effects on bulk metallic glasses are considered. 关键词：BULK metallic GLASSES MECHANICAL properties cooling-rate EFFECTS RESIDUAL stress

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Effects of cooling rates on the mechanical properties of a Ti-based bulk metallic glass

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