On the relationship between the accumulation and release of elastic energy during the flow serrations of a Zr-based bulk metallic glass

被引：9

作者：

Chen, S. H. ^{[1
]}

Li, C. ^{[1
]}

Zhang, J. S. ^{[2
]}

Qin, Y. Q. ^{[3
,4
]}

Yang, H. D. ^{[1
]}

Zhang, J. C. ^{[1
]}

Chang, W. J. ^{[1
]}

Tang, H. H. ^{[1
]}

Wu, Y. C. ^{[3
,4
]}

机构：

[1] Hefei Univ Technol, Sch Mech Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Sch Automobile & Traff Engn, Hefei 230009, Peoples R China

[3] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[4] Natl Local Joint Engn Res Ctr Nonferrous Met & Pr, Hefei 230009, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 817卷

基金：

中国国家自然科学基金;

关键词：

Bulk metallic glass; Elastic energy accumulation rate; Load drop; Shear band; Complex stress field; SHEAR BANDS; DEFORMATION-BEHAVIOR; COMPRESSION; STRENGTH;

D O I：

10.1016/j.msea.2021.141423

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, the relationship between the accumulation and release of elastic energy during the flow serrations of a bulk metallic glass (BMG) was investigated by use of 10 groups of specimens under varying mixed-mode (I/ II) loading conditions. The findings have shown that both the elastic energy accumulation rates and load drops have significant variations, and the load drop data are more scattered than elastic energy accumulation rates. The large variations of load drops are intrinsic for BMGs, while the variations of elastic energy accumulation rates can be reduced to improve/control the plastic deformation of BMGs. Moreover, smaller elastic energy accumulation rates can result in smaller load drops, resulting from the formation of more shear-band intersections. The present work is of significance for understanding the underlying mechanisms of flow serrations of BMGs. It also suggests that more attention could be paid into the elastic energy accumulation process in order to uncover the plastic deformation mechanisms of BMGs.

引用

页数：9

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