Abstract: Is it HELP or HEDE? This seminar discusses hydrogen embrittlement in Ni and Ni-based alloys. Two recent experiments suggest that the mechanism is not localized plasticity (HELP), but rather a decohesion-type mechanism (HEDE) linked to metastable nickel hydrides. Evidence from in situ deformation and neutron diffraction supports the role of grain boundary hydrides in […]
Abstract: When metals are exposed to hydrogen (H)-rich environments, they may lose ductility and fail catastrophically without showing any sign of damage. This problem is known as hydrogen embrittlement (HE). Over the last few decades, extensive research on HE has shown that hydrogen-assisted cracking is a microstructure-sensitive phenomenon.
