Asymmetric crack wake plasticity - a reason for roughness induced crack closure

被引：56

作者：

Pippan, R ^{[1
]}

Strobl, G ^{[1
]}

Kreuzer, H ^{[1
]}

Motz, C ^{[1
]}

机构：

[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 15期

关键词：

roughness induced crack closure; electron backscattering diffraction; fatigue crack propagation;

D O I：

10.1016/j.actamat.2004.06.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Asymmetric arrangement of geometrically necessary dislocations in the wake of a crack tip induces a mismatch of fracture surfaces. It can explain the occurrence of the roughness induced crack closure far behind the fatigue crack tip. The asymmetric arrangement of geometrically necessary dislocations is verified by local crystal orientation measurements on fatigue crack in the near threshold regime in Cu and Fe. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4493 / 4502

页数：10

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