Shear band melting and serrated flow in metallic glasses

被引：104

作者：

Georgarakis, K. ^{[1
]}

Aljerf, M. ^{[1
]}

Li, Y. ^{[1
]}

LeMoulec, A. ^{[1
]}

Charlot, F. ^{[1
]}

Yavari, A. R. ^{[1
]}

Chornokhvostenko, K. ^{[2
]}

Tabachnikova, E. ^{[2
]}

Evangelakis, G. A. ^{[3
]}

Miracle, D. B. ^{[4
]}

Greer, A. L. ^{[5
]}

Zhang, T. ^{[6
]}

机构：

[1] Inst Natl Polytech Grenoble, CNRS, SIMaP, F-38402 St Martin Dheres, France

[2] Kharkiv Polytech Inst, UA-61002 Kharkov, Ukraine

[3] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece

[4] USAF, Mat & Mfg Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA

[5] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[6] Beijing Univ Aeronaut & Astronaut, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 03期

关键词：

D O I：

10.1063/1.2956666

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Scanning electron microscopy observations of shear steps on Zr-based bulk metallic glasses show direct evidence of shear band melting due to heat generated by elastic energy release. The estimated range of attained temperatures and the observed morphologies are consistent with shear steps forming at a subsonic speed limited by a required redistribution of local microscopic stresses. The calculations indicate that a 0.2 mu m layer melts in the vicinity of a shear band forming a 1 mu m shear step. The plastic part of the stress strain curve is serrated but a majority of shear events are not associated to serrations. (C) 2008 American Institute of Physics.

引用

页数：3

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