The role of ambient and cryogenic pre-strain on hydrogen embrittlement of a FeNiCoCr high-entropy alloy: A comparative study
Source abstract
Abstract
The effect of pre-strain at different temperatures on hydrogen embrittlement (HE) of FeNiCoCr high-entropy alloys was investigated through slow strain rate tension under cathodic hydrogen charging. Compared with room-temperature pre-strain, cryogenic pre-strain enhanced yield strength and alleviated HE, which was primarily attributed to the advantageous nano-twinned structure composed of massive microband–twin interactions. In addition, the cryogenically pre-strained specimen exhibited severe transgranular cracking along the twin boundaries, but much finer intergranular cracks. Pre-existing nano-twins served as effective trapping sites for diffusible hydrogen and also suppressed dynamic hydrogen transport through fresh twins.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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