The role of cryogenic pre-strain on the hydrogen embrittlement of FeNiCoCrMn high-entropy alloys

The effect of cryogenic plastic pre-strain (15 %, 30 %, and 45 % true strain) on the hydrogen embrittlement (HE) of an equimolar FeNiCoCrMn high-entropy alloy was studied through slow strain rate tension (SSRT) at 1 x 10-5 s-1. As the pre-strain increased, ductility loss under harsh electrochemical hydrogen charging showed a downward trend accompanied by the promotion of hydrogen adsorption. This work provided an effective strategy for achieving the synergy of high strength and improved HE resistance. Data availability statement: The raw/processed data required to reproduce these findings cannot be shared at this time as the data is related to an ongoing study.

Automated summary

The effect of cryogenic plastic pre-strain on the hydrogen embrittlement of an equimolar FeNiCoCrMn high-entropy alloy was investigated. As the pre-strain increased, the ductility loss under harsh electrochemical hydrogen charging decreased while hydrogen adsorption was promoted. This study provides an effective strategy for achieving high strength and improved hydrogen embrittlement resistance.