Crack-tip plasticity in bulk metallic glasses

被引：30

作者：

Flores, KM ^{[1
]}

Dauskardt, RH ^{[1
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2001年 / 319卷

关键词：

amorphous metal; metallic glassy; fracture; stress state effects; heating; plasticity;

D O I：

10.1016/S0921-5093(01)01111-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The fracture and plastic deformation mechanisms of a Zr-Ti-Ni-Cu-Be bulk metallic glass are reviewed. In particular. the effects of stress state and local heating on the development of shear bands are discussed. The temperature increase at the crack tip during fracture was measured and was found to be consistent with predictions of the dissipation of plastic work as heat. In order to examine the effect of stress state on failure. tensile bars with notches of varying severity were used to superimpose a tensile mean stress. A constant mean stress was found to provide an accurate correlation with the onset of strain localization and failure. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：511 / 515

页数：5

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