Scholarlink

<p>This study represents the first systematic investigation of hydrogen embrittlement behavior in low-temperature environments for high-manganese austenitic steel weld metal. The weld metal was fabricated using Fe-24Mn-0.4C-4Cr base metal coupled with compositionally matched welding wire through submerged arc welding. The microstructural characteristics of the weld metal were characterized through multi-scale analyses. Slow strain rate tensile tests coupled with electrochemical hydrogen charging were conducted at both ambient (25 °C) and low (−80 °C) temperatures to quantify hydrogen embrittlement sensitivity. The results indicate that as temperature decreases from 25 to −80&#xa0;°C, the strength of the weld metal increases markedly, whereas the elongation drops significantly. The hydrogen embrittlement sensitivity increased from 36% at 25&#xa0;°C to 40% at −80&#xa0;°C, indicating aggravated embrittlement at low temperatures. Microstructural interrogation identified three synergistic contributors to the exacerbated hydrogen embrittlement sensitivity: grain size, inclusions, and deformation-induced martensite, with deformation-induced martensite being the dominant factor.</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

Low-temperature hydrogen embrittlement of high manganese austenitic steel weld metal

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Zhengyang Li,
  • Xiangliang Wan,
  • Xiangtao Deng,
  • Guangqiang Li

摘要

This study represents the first systematic investigation of hydrogen embrittlement behavior in low-temperature environments for high-manganese austenitic steel weld metal. The weld metal was fabricated using Fe-24Mn-0.4C-4Cr base metal coupled with compositionally matched welding wire through submerged arc welding. The microstructural characteristics of the weld metal were characterized through multi-scale analyses. Slow strain rate tensile tests coupled with electrochemical hydrogen charging were conducted at both ambient (25 °C) and low (−80 °C) temperatures to quantify hydrogen embrittlement sensitivity. The results indicate that as temperature decreases from 25 to −80 °C, the strength of the weld metal increases markedly, whereas the elongation drops significantly. The hydrogen embrittlement sensitivity increased from 36% at 25 °C to 40% at −80 °C, indicating aggravated embrittlement at low temperatures. Microstructural interrogation identified three synergistic contributors to the exacerbated hydrogen embrittlement sensitivity: grain size, inclusions, and deformation-induced martensite, with deformation-induced martensite being the dominant factor.