Effects of defect size and location on high cycle fatigue life of a maraging stainless steel at ambient and cryogenic temperatures

•HCF tests are conducted on 142 specimens at ambient and cryogenic temperatures.•Crack initiation mechanism at cryogenic temperature is investigated with emphasis.•Reduction in HCF life caused by defect are examined by a normalization approach.•The Z parameter is improved to suit different stress ra...

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Bibliographic Details
Published in:International journal of fatigue 2022-08, Vol.161, p.106906, Article 106906
Main Authors: Chang, Dong-Kai, Wang, Qiong-Qi, Chen, Hui, Zhang, Xian-Cheng, Wen, Jian-Feng, Tu, Shan-Tung
Format: Article
Language:English
Subjects:
Crack initiation
Crack propagation
Cryogenic engineering
Cryogenic temperature
Defect distribution
Fatigue failure
Fatigue life
Fatigue tests
Fracture mechanics
Fracture surfaces
High cycle fatigue
Life prediction
Maraging steels
Materials fatigue
Metal fatigue
Parameter modification
Stainless steel
Stainless steels
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Summary:•HCF tests are conducted on 142 specimens at ambient and cryogenic temperatures.•Crack initiation mechanism at cryogenic temperature is investigated with emphasis.•Reduction in HCF life caused by defect are examined by a normalization approach.•The Z parameter is improved to suit different stress ratios and temperatures. In some extreme service environments, materials with properties to resist cryogenic temperatures and intense vibration are required. In this study, high cycle fatigue (HCF) tests with different stress ratios were conducted on maraging stainless steel at both ambient and cryogenic temperatures. Fracture surface observation indicates that internal fatigue crack initiation prevails over surface initiation at cryogenic temperatures. A normalization method was proposed to examine the effects of defect size and location on the fatigue life. Furthermore, the Z parameter was modified to predict HCF life at different stress ratios and temperatures, with improved accuracy.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2022.106906