Dynamic strength behavior of a Zr-based bulk metallic glass under shock loading

作     者：俞宇颖 习锋 戴诚达 蔡灵仓 谭叶 李雪梅 吴强 谭华 Yu Yu-Ying;Xi Feng;Dai Cheng-Da;Cai Ling-Cang;Tan Ye;Li Xue-Mei;Wu Qiang;Tan Hua;Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,Chinese Academy of Engineering Physics

作者机构：Laboratory for Shock Wave and Detonation Physics ResearchInstitute of Fluid PhysicsChinese Academy of Engineering Physics 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2015年第24卷第6期

页      面：461-465页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11172281) 

主　　题：shock loading dynamic strength bulk metallic glass 

摘      要：Dynamic strength behavior of Zr51Ti5NiloCu25A19 bulk metallic glass （BMG） up to 66 GPa was investigated in a series of plate impact shock-release and shock-reload experiments. Particle velocity profiles measured at the sample/LiF window interface were used to estimate the shear stress, shear modulus, and yield stress in shocked BMG. Beyond confirm- ing the previously reported strain-softening of shear stress during the shock loading process for BMGs, it is also shown that the softened Zr-BMG still has a high shear modulus and can support large yield stress when released or reloaded from the shocked state, and both the shear modulus and the yield stress appear as strain-hardening behaviors. The work provides a much clearer picture of the strength behavior of BMGs under shock loading, which is useful to comprehensively understand the plastic deformation mechanisms of BMGs.