(S199)Effects of chromium and molybdenum on the hydrogen embrittlement susceptibility in iron

摘要

It is necessary to increase materials resistance to hydrogen embrittlement in order to develop hydrogen energy materials and avoid sudden fracture caused by hydrogen (H). Based on previous study, substitutional atoms, chromium (Cr) and molybdenum (Mo), in iron (Fe) that exert repulsive force on hydrogen contribute decreasing equilibrium concentration of hydrogen (CH) and increasing heat of solution of hydrogen (AH)1). However, evaluation of hydrogen embrittlement susceptibility (HES) in these materials have not been investigated. Thus, tensile tests, scanning electron microscope (SEM), and electron backscatter diffraction (EBSD) analysis have been conducted to study the effect of Cr and Mo on the HES in Fe.