中国物理B ›› 2015, Vol. 24 ›› Issue (6): 66201-066201.doi: 10.1088/1674-1056/24/6/066201

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

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

俞宇颖, 习锋, 戴诚达, 蔡灵仓, 谭叶, 李雪梅, 吴强, 谭华   

  1. Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics,Mianyang 621900, China
  • 收稿日期:2014-11-25 修回日期:2015-02-05 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:

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

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

Yu Yu-Ying (俞宇颖), Xi Feng (习锋), Dai Cheng-Da (戴诚达), Cai Ling-Cang (蔡灵仓), Tan Ye (谭叶), Li Xue-Mei (李雪梅), Wu Qiang (吴强), Tan Hua (谭华)   

  1. Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics,Mianyang 621900, China
  • Received:2014-11-25 Revised:2015-02-05 Online:2015-06-05 Published:2015-06-05
  • Contact: Yu Yu-Ying E-mail:yuyinyu@caep.cn
  • About author:62.20.de; 62.20.F-; 62.50.Ef; 64.70.pe
  • Supported by:

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

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摘要：

Dynamic strength behavior of Zr51Ti5Ni10Cu25Al9 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 confirming 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.

关键词: shock loading, dynamic strength, bulk metallic glass

Abstract:

Dynamic strength behavior of Zr51Ti5Ni10Cu25Al9 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 confirming 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.

Key words: shock loading, dynamic strength, bulk metallic glass

中图分类号:  (Elastic moduli)

  • 62.20.de
62.20.F- (Deformation and plasticity) 62.50.Ef (Shock wave effects in solids and liquids) 64.70.pe (Metallic glasses)