Scholarlink

<p>High-entropy alloys (HEA) have a broad application prospect in structural components in many fields. However, they may suffer from hydrogen embrittlement (HE) in hydrogen-containing environments, and the HE resistance and mechanism are not clear. Therefore, in this work, the FeCoCrNiMo<sub>0.1</sub> HEA was fabricated through magnetic suspension melting. The HE resistance and mechanism was investigated through thermal desorption analysis and slow strain rate tensile tests under dynamic hydrogen charging. The microstructure is composed of the fcc phase similar to 904L stainless steel. Compared to the conventional 904L stainless steel, the HEA exhibits higher HE resistance and better combination of strength and ductility attributed to the lattice distortion effect. The HEA is HE-susceptible, and the mechanism is a mixture of hydrogen-enhanced localized plasticity and hydrogen-enhanced decohesion. As a result, grain boundary triple junctions tend to be HE initiation sites, and cracks mainly propagate in the intergranular path.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hydrogen Embrittlement Resistance and Mechanism of the FeCoCrNiMo0.1 High-Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年3月24日

查看全文
  • Chunduo Dai,
  • Yang Yu,
  • Meihui Sun,
  • Jianbo Jiang,
  • Yue Pan,
  • Cuiwei Du

摘要

High-entropy alloys (HEA) have a broad application prospect in structural components in many fields. However, they may suffer from hydrogen embrittlement (HE) in hydrogen-containing environments, and the HE resistance and mechanism are not clear. Therefore, in this work, the FeCoCrNiMo0.1 HEA was fabricated through magnetic suspension melting. The HE resistance and mechanism was investigated through thermal desorption analysis and slow strain rate tensile tests under dynamic hydrogen charging. The microstructure is composed of the fcc phase similar to 904L stainless steel. Compared to the conventional 904L stainless steel, the HEA exhibits higher HE resistance and better combination of strength and ductility attributed to the lattice distortion effect. The HEA is HE-susceptible, and the mechanism is a mixture of hydrogen-enhanced localized plasticity and hydrogen-enhanced decohesion. As a result, grain boundary triple junctions tend to be HE initiation sites, and cracks mainly propagate in the intergranular path.