Ideal strengths of bcc metals

被引：112

作者：

Krenn, CR ^{[1
]}

Roundy, D

Morris, JW

Cohen, ML

机构：

[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

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

基金：

美国国家科学基金会;

关键词：

ideal strength; bcc ductile-brittle transition; pencil-glide;

D O I：

10.1016/S0921-5093(01)00998-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present ab initio ideal strength calculations in body-centered cubic (bcc) tungsten for 'pencil-glide' slip on {110}, {112}, and {123} planes and for the {100} cleavage strength. We use these results to analyze the tensile and shear strengths of other bcc metals. In all bee metals, the minimum shear strength on any plane containing <111> is approximate to0.11/S-<111>, where S-<111> is the elastic compliance for any shear in a <111> direction. The ideal cleavage strength on {100} for many bee metals is approximate to0.083/s(11) where s(11) is the single crystal elastic compliance. Comparison of the ideal shear and tensile strengths offers a measure of the inherent ductility or brittleness of a material. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 114

页数：4

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