Fatigue crack propagation under gaseous hydrogen in a precipitation-hardened martensitic stainless steel
Fatigue crack propagation under gaseous hydrogen in a precipitation-hardened martensitic stainless steel
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沉淀硬化马氏体不锈钢中气态氢下的疲劳裂纹扩展
DOI：
10.1016/j.ijhydene.2011.04.094
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发表时间：
2011
影响因子：
7.2
通讯作者：
G. Hénaff
中科院分区：
文献类型：
--
作者：
Zhidan Sun;G. Benoît;C. Moriconi;F. Hamon;D. Halm;G. Hénaff
为了研究结构材料在高压氢气氛下的力学性能，P′研究所研制了一种试验装置。本文介绍了马氏体不锈钢疲劳裂纹扩展的初步结果。一个巨大的疲劳裂纹扩展增强观察在高压（9 MPa）。这种增强依赖于压力。值得注意的是，最大增强与脆性断裂模式相关联。然而，没有注意到在这个制度的晶间脱粘。
A test device has been developed at P′ Institute in order to investigate the mechanical behaviour of structural materials under high pressure of gaseous hydrogen. In this paper, preliminary results on fatigue crack propagation in a martensitic stainless steel are presented. A tremendous fatigue crack growth enhancement is observed at high pressure (9 MPa). This enhancement is dependent of pressure. It is noticed that the maximum enhancement is associated with a brittle fracture mode. However no intergranular decohesion is noticed in this regime.