Mechanism of Hydrogen Embrittlement Due to the Interaction of a Crack, Moving Dislocations and Hydrogen Cluster
Previously, we proposed stress corrosion cracking model on the basis of interaction of dislocation and hydrogen around a crack tip to predict discontinuous cleavage-like fracture during stress corrosion cracking (SCC) for ductile fcc alloys. Furthermore, we conducted numerical analyses using this proposed model. In the analysis, hydrogen was treated as a static cluster. However, actually, both of hydrogen and dislocations move with interaction each other. Therefore, in this paper, a physical model of dislocation and hydrogen dynamics with interaction was proposed. And the behavior of interaction between dynamic dislocations and hydrogen was investigated. On the basis of this analysis, the discontinuous cleavage-like fracture during SCC for ductile fcc alloys was clarified.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
S. Taketomi et al., "Mechanism of Hydrogen Embrittlement Due to the Interaction of a Crack, Moving Dislocations and Hydrogen Cluster", Key Engineering Materials, Vols. 261-263, pp. 937-942, 2004