Abstract
The hydrogen trapping capability and the effect on hydrogen embrittlement (HE) of Cu precipitations of the aged martensitic stainless steel were studied. The results shows that the hydrogen diffusion coefficient of specimens containing Cu precipitations reduced by an order of magnitude and the hydrogen content greatly increased. The peak-aged specimens (1 h) having the highest HE susceptibility was due to abundant hydrogen trapped by Cu precipitations coherent with matrix and escaped from the traps of Cu precipitations during tensile process. While Cu precipitations semi-coherent with matrix might have higher hydrogen trapping capability and reduce the HE sensitivity. Data AvailabilityThe raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
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