Shear bands in metallic glasses

A. L. Greer, Y. Q. Cheng, E. Ma

Research output: Contribution to journalReview articlepeer-review

1353 Scopus citations

Abstract

Shear-banding is a ubiquitous plastic-deformation mode in materials. In metallic glasses, shear bands are particularly important as they play the decisive role in controlling plasticity and failure at room temperature. While there have been several reviews on the general mechanical properties of metallic glasses, a pressing need remains for an overview focused exclusively on shear bands, which have received tremendous attention in the past several years. This article attempts to provide a comprehensive and up-to-date review on the rapid progress achieved very recently on this subject. We describe the shear bands from the inside out, and treat key materials-science issues of general interest, including the initiation of shear localization starting from shear transformations, the temperature and velocity reached in the propagating or sliding band, the structural evolution inside the shear-band material, and the parameters that strongly influence shear-banding. Several new discoveries and concepts, such as stick-slip cold shear-banding and strength/plasticity enhancement at sub-micrometer sample sizes, will also be highlighted. The understanding built-up from these accounts will be used to explain the successful control of shear bands achieved so far in the laboratory. The review also identifies a number of key remaining questions to be answered, and presents an outlook for the field.

Original languageEnglish
Pages (from-to)71-132
Number of pages62
JournalMaterials Science and Engineering R: Reports
Volume74
Issue number4
DOIs
StatePublished - Apr 2013

Funding

The authors are indebted to Dr. Yi Li for his input, especially for the figures and related explanations he supplied for inclusion in several sub-sections in the earlier drafts of this review. The authors also thank Dr. Konstantinos Georgarakis for providing the micrograph used in Fig. 10 and as the cover image. A.L. Greer acknowledges support from the Engineering and Physical Sciences Research Council (UK) and from the World Premier International Research Center Initiative (WPI), MEXT, Japan . Y.Q. Cheng is supported at ORNL by the Scientific User Facilities Division , Office of Basic Energy Sciences , US Department of Energy . E. Ma acknowledges the support by the US National Science Foundation , Grant No. DMR-0904188 .

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