Abstract In the present study, the effect of nitrogen alloying on hydrogen embrittlement in FeMnNiCoCr high-entropy alloys was investigated. In tension, hydrogen-free nitrogen-alloyed FeMnNiCoCrN alloy (0.37 wt.% N) demonstrated higher strength, strain hardening, and elongation-to-failure than the interstitial-free FeMnNiCoCr Cantor alloy. Despite the different tensile properties, both alloys fractured via a ductile dimple micromechanism. After hydrogen charging, the nitrogen-alloyed material demonstrated lower strain hardening and higher sensitivity to hydrogen-assisted embrittlement than the interstitial-free alloy. Both alloys featured a stable austenitic structure and similar grain size, yet, the nitrogen-alloyed FeMnNiCoCr alloy was more susceptible to hydrogen embrittlement. Although, the overall degradation effects appear similar, there are pronounced differences in mechanical behavior and hydrogen transport upon hydrogen charging when the high-entropy alloys are compared to conventional austenitic stainless steels, and the experiments reveales that nitrogen alloying enhances hydrogen diffusivity in the Cantor alloy.

中文翻译：

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氮合金化对 FeMnNiCoCr 高熵合金氢辅助塑性变形和断裂的影响

摘要 在本研究中，研究了氮合金化对 FeMnNiCoCr 高熵合金氢脆的影响。在张力方面，无氢氮合金 FeMnNiCoCrN 合金 (0.37 wt.% N) 表现出比无间隙 FeMnNiCoCr Cantor 合金更高的强度、应变硬化和断裂伸长率。尽管拉伸性能不同，但两种合金均通过延展性凹坑微观机制断裂。充氢后，与无间隙合金相比，氮合金材料表现出更低的应变硬化和更高的氢致脆化敏感性。两种合金均具有稳定的奥氏体结构和相似的晶粒尺寸，但氮合金 FeMnNiCoCr 合金更容易发生氢脆。虽然整体降解效果看起来相似，