Effect of absorbed hydrogen on the near threshold fatigue crack growth behavior of short crack

被引:9
|
作者
Shishime, Keiko [1 ]
Kubota, Masanobu [1 ]
Kondo, Yoshiyuki [1 ]
机构
[1] Kyushu Univ, Dept Intelligent Machinery & Syst, Nishi Ku, Fukuoka 8190395, Japan
关键词
fatigue; hydrogen; short crack; threshold stress intensity factor; Vickers hardness; microstructure;
D O I
10.4028/www.scientific.net/MSF.567-568.409
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Hydrogen is considered to be a possible energy source in the coming future. However, it has been recognized that hydrogen has a detrimental effect on the fatigue strength of metal. The fatigue crack growth characteristic is an important property for the integrity assessment of hydrogen utilization machine. In this report, the effect of hydrogen on the fatigue crack propagation characteristic was studied using low alloy steel, carbon steels and A286 alloy. Especially in this study, very short pre-cracked specimen as small as 0.03 min deep was used and the near threshold fatigue crack behavior was studied. As a result, materials whose Vickers hardness was higher than 300 were found to be susceptible to absorbed hydrogen.
引用
收藏
页码:409 / 412
页数:4
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