Progressive shear band propagation in metallic glasses under compression

IMR OpenIR

	Progressive shear band propagation in metallic glasses under compression
	Qu, R. T.; Liu, Z. Q.; Wang, G.; Zhang, Z. F.; zhfzhang@imr.ac.cn
	2015
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	91 页码:19-33
摘要	Shear band plays a key role in dominating the strength and plasticity of metallic glasses, and exhibits two kinds of propagation modes under compression, i.e., progressive and simultaneous propagation. These two different propagation modes of shear bands lie in different stages of plastic deformation. Prior to macroscopic yielding, shear bands have already been initiated yet not penetrated through the sample. These inserting shear bands exhibit linearly decreasing plastic strain from the end to tip, demonstrating a progressive propagation mode. Once the macroscopic yielding occurs, the major shear band fully transects the sample and propagates in a simultaneous sliding manner. The progressive propagation of shear bands causes an apparent work-hardening behavior, which can be well explained by assuming a higher critical stress for shear band initiation than propagation. The results demonstrate that metallic glasses with a smaller difference between critical conditions for initiation and propagation of shear band should have better plastic deformability, which can be reflected by the plastic strain to macroscopic yielding read from stress strain curves. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[qu, r. t. ; liu, z. q. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [wang, g.] shanghai univ, lab microstruct, shanghai 200444, peoples r china
关键词	Metallic Glass Shear Band Compression Plastic Deformation Stress-strain Response
资助者	National Natural Science Foundation of China (NSFC) [51331007, 51301174]; IMR SYNL-T.S. Ke Research Fellowship; China Postdoctoral Science Foundation [2014M561263]
收录类别	sci
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75081
专题	中国科学院金属研究所
通讯作者	zhfzhang@imr.ac.cn
推荐引用方式 GB/T 7714	Qu, R. T.,Liu, Z. Q.,Wang, G.,et al. Progressive shear band propagation in metallic glasses under compression[J]. ACTA MATERIALIA,2015,91:19-33.
APA	Qu, R. T.,Liu, Z. Q.,Wang, G.,Zhang, Z. F.,&zhfzhang@imr.ac.cn.(2015).Progressive shear band propagation in metallic glasses under compression.ACTA MATERIALIA,91,19-33.
MLA	Qu, R. T.,et al."Progressive shear band propagation in metallic glasses under compression".ACTA MATERIALIA 91(2015):19-33.