Abstract This work presents a comprehensive study of the hydrogen embrittlement (HE) behavior of a 13Cr-5Ni-2Mo supermartensitic stainless steel through two aspects: hydrogen diffusion and hydrogen concentration. Precipitated austenite reduced the effective hydrogen diffusion coefficient and hydrogen permeation flux, and thus increased the HE resistance. Further increasing the austenite content could not provide additional HE resistance as a martensitic transformation is prone to occur when a high hydrogen concentration and stress are coupled, leading to hydrogen induced crack initiation. The HE susceptibility of 13Cr-5Ni-2Mo steel is much higher than that of 960QC steel because of the higher adsorbing hydrogen concentration.

中文翻译：

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13Cr-5Ni-2Mo超马氏体不锈钢的氢脆行为

摘要 本工作通过氢扩散和氢浓度两个方面对 13Cr-5Ni-2Mo 超马氏体不锈钢的氢脆 (HE) 行为进行了综合研究。析出的奥氏体降低了有效氢扩散系数和氢渗透通量，从而增加了耐HE。进一步增加奥氏体含量不能提供额外的 HE 抗性，因为当高氢浓度和应力耦合时容易发生马氏体转变，导致氢致裂纹萌生。由于吸附氢浓度较高，13Cr-5Ni-2Mo钢的HE磁化率远高于960QC钢。