J.L. Li
,
K.F. Wang
,
J. Li
,
Z.M. Yao and W. Ke(Fushun Petroleum Institute
,
Fushun 113001
,
China)(Department of Chemical Engineering
,
Zhejiang University
,
Hangzhou 310027
,
China)(Institute of Corrosion and Protection of Metals
,
The Chinese Academy of Sciences
,
Shengyang 110015
,
China)
金属学报(英文版)
Influence of hydrogen attack on mechanical and fatigue properties of 1020, 15CrMo and 2.25Cr-1Mo steels has been studied, which were exposed to gaseous hydrogen at pressure of 18MPa and 300-480℃ for up to 480h. The results of fatigue test showed that hydrogen attack (HA) resulted in an obvious change in fatigue properties of 1020 and 15CrMo steels, however, 2.25Cr-1Mo steel showed a lower susceptibility to hydrogen attack due to the addition of Cr and Mo. Fatigue crack behaviour for 1020 steel is attributed to hydrogen attack damage and the crack closure induced by the rough cracking surface, which lead to a valley on △Kth～HA% plot. The change in the fatigue behaviour of 15CrMo steel is possibly caused by severe surface decarburization.
关键词:
hydrogen attack
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