ROUGHNESS OF A CRACK FRONT PINNED BY MICROSTRUCTURAL OBSTACLES

被引：32

作者：

DAGUIER, P

BOUCHAUD, E

LAPASSET, G

机构：

[1] ONERA, OM, Avenue de la Division Leclerc, Chatilkm Cedex

来源：

EUROPHYSICS LETTERS | 1995年 / 31卷 / 07期

关键词：

D O I：

10.1209/0295-5075/31/7/005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The morphology of crack fronts stopped during their propagation at pinning microstructural obstacles in two different metallic alloys is analysed, and their ''in-plane'' roughness index is determined for the first time. In the case of the 8090 Al-Li alloy, which has a very anisotropic microstructure, the roughness of the tensile crack front propagating along the grains length is equal to zeta = 0.60 +/- 0.04. On the other hand, the roughness of the purely three-dimensional fatigue crack front in the Super alpha(2) Ti3Al-based alloy is equal to zeta = 0.54 +/- 0.03.

引用

页码：367 / 372

页数：6

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