On a correlation between hydrogen effects on atomic interactions and mobility of grain boundaries in the alpha-iron. Stage II. Mobility of grain boundaries in the H-charged α-iron

Abstract

Using molecular dynamics, it is shown that, be located in the vicinity of grain boundaries, hydrogen in the α-iron increases their mobility. This effect is attributed to the hydrogen-increased concentration of free electrons, which decreases surface tension at grain boundaries. The obtained results allow to explain the early start of recrystallization in the hydrogenated cold-worked iron-based alloys.