An investigation of crack growth behaviour under creep-fatigue condition

被引：10
|
作者：
Gao, N [1 ]
Brown, MW
Miller, KJ
Reed, PAS
机构：
[1] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England
[2] Univ Sheffield, Dept Mech & Proc Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 410卷
关键词：
creep-fatigue; short crack; crack coalescence;
D O I：
10.1016/j.msea.2005.08.076
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An investigation has been carried out on short crack growth behaviour of AISI type 316 stainless steel under creep-fatigue conditions at 550 degrees C for high strain ranges of 0.9-2.5% and 60 min hold-time using a high temperature reverse bending rig. The analysis revealed the dominant failure characteristics to be the individual initiation and growth behaviour of many minor cracks in Stage I, and their subsequent coalescence in Stage II. Increasing the strain range increases the number of minor cracks and promotes the process of minor crack coalescence. Predominantly intergranular long cracks are found to form under tensile stresses and transgranular short cracks under compressive stresses. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：67 / 71
页数：5
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