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

doi:10.1088/1674-1056/24/6/066201

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.

Keywords: shock loading dynamic strength bulk metallic glass

Received: 25 November 2014
Revised: 05 February 2015
Accepted manuscript online:

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

Fund:

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

Corresponding Authors: Yu Yu-Ying
E-mail: yuyinyu@caep.cn

About author: 62.20.de; 62.20.F-; 62.50.Ef; 64.70.pe

Cite this article:

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) Dynamic strength behavior of a Zr-based bulk metallic glassunder shock loading 2015 Chin. Phys. B 24 066201

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