Progressive shear band propagation in metallic glasses under compression
Qu, R. T.; Liu, Z. Q.; Wang, G.; Zhang, Z. F.;
Source PublicationACTA MATERIALIA
AbstractShear 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.
description.department[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
KeywordMetallic Glass Shear Band Compression Plastic Deformation Stress-strain Response
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51331007, 51301174]; IMR SYNL-T.S. Ke Research Fellowship; China Postdoctoral Science Foundation [2014M561263]
Indexed Bysci
Document Type期刊论文
Recommended Citation
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.,& 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.
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