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<p><b>Abstract</b>—The hydrogen embrittlement of Fe<sub>20</sub>Mn<sub>20</sub>Cr<sub>20</sub>Ni<sub>20</sub>Co<sub>20–<i>x</i></sub>N<sub><i>x</i></sub> alloys (<i>x</i> = 0.8, 1.4 at %) with disperse Cr<sub>2</sub>N particles is studied. The formation of grain-boundary nitrides is shown to favor a decrease in the hydrogen embrittlement index, unlike a fine-grained structure with homogeneously distributed particles. The influence of the interfaces formed during precipitation hardening of the alloys on the fracture micromechanisms in the hydrogen-induced brittle surface zone is described.</p>

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Influence of Microstructure and Phase Distribution on the Hydrogen Embrittlement of Multicomponent Alloys Fe20Mn20Cr20Ni20Co19.2N0.8 and Fe20Mn20Cr20Ni20Co18.6N1.4

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • E. G. Astafurova,
  • D. Yu. Gurtova,
  • S. V. Astafurov,
  • E. V. Mel’nikov

摘要

Abstract—The hydrogen embrittlement of Fe20Mn20Cr20Ni20Co20–xNx alloys (x = 0.8, 1.4 at %) with disperse Cr2N particles is studied. The formation of grain-boundary nitrides is shown to favor a decrease in the hydrogen embrittlement index, unlike a fine-grained structure with homogeneously distributed particles. The influence of the interfaces formed during precipitation hardening of the alloys on the fracture micromechanisms in the hydrogen-induced brittle surface zone is described.