Abstract
The effect of e-carbide on hydrogen embrittlement (HE) susceptibility was evaluated in a quenching–partitioning–tempering (Q-P-T) treated steel. Total elongation loss (1 min hydrogen charging) drops from 42.7% to 0.6% after the tempering treatment. A significant improvement to HE is associated with the trapping capacity of e-carbide, which is revealed by thermal desorption spectroscopy analysis and three-dimensional atom probe. A possible mechanism is discussed to explain the improved resistance to HE.
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