Crack opening displacement and propagation rate of micro structurally short cracks

被引：12

作者：

Blochwitz, C ^{[1
]}

Tirschler, W ^{[1
]}

Weidner, A ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Phys Met, D-01062 Dresden, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 357卷 / 1-2期

关键词：

fatigue; short cracks; crack opening displacement; in situ SEM observations; austenitic stainless steel;

D O I：

10.1016/S0921-5093(03)00212-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Crack opening displacement (COD) along the edges of micro structurally short fatigue cracks in austenitic stainless steel was investigated in situ in the SEM. The measured plastic part of the COD range between maximum and minimum load was extrapolated to the near crack tip region, assuming plastic blunting and resharpening by cooperative slip as well known for long cracks. In accordance with the blunting model, the measured crack propagation per cycle is about the half of the extrapolated plastic COD range. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：264 / 269

页数：6

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