The lattice defects, especially vacancies, formed during tensile deformation in a hydrogen environment have been evaluated by positron annihilation lifetime spectroscopy (PALS). results from several such evaluations previous studies hydrogen-charged iron, steels, and Ni-based alloys are reviewed this study with reference to embrittlement models. A strong tendency increase the for vacancy cluste...

Hydrogen embrittlement limits the service life of various metallic components by causing a transition from ductile to brittle failure inherently alloys. In this work, using first-principles calculations, effect interstitial hydrogen on ideal shear strength across metals (Al, Ni, Fe, Nb, Ti, and Zr) its implications plasticity are discussed. The presence led volumetric expansion, which in turn h...

Hydrogen diffusion and its interaction with dislocations play an important role in hydrogen embrittlement, however, such a process multiple-principal high entropy alloys (HEAs) is still elusive. Here, first-principles calculations were performed to investigate the solution of effect on stacking fault energy FeCoNiCrMn. It shown that unique lattice distortion HEAs causes wide distribution local ...