Fatigue crack propagation under gaseous hydrogen in a precipitation-hardened martensitic stainless steel

✍ Scribed by Z. Sun; G. Benoit; C. Moriconi; F. Hamon; D. Halm; F. Hamon; G. Hénaff

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 848 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2011.04.094

✦ Synopsis

A test device has been developed at P 0 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.