Recent Studies of Hydrogen-related Defects in Iron-based Materials

The interactions between hydrogen, dislocations and vacancies that lead to the hydrogen embrittlement of iron-based materials have remained largely unknown with major impediments for development infrastructure transport storage. Recent studies hydrogen-induced lattice defects formed in pure iron common austenitic stainless steels by positron annihilation lifetime spectroscopy provided a breakthrough understanding controlling factors process. In this review, main results those are summarized discussed together current knowledge hydrogen-related defects. formation vacancy-hydrogen complexes coupled plastic strain localization which is large enough hydrogen-enhanced vacancy clustering during deformation appears be likely factor triggers bcc(α-) fcc(γ)-iron.