Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Hydrogen Embrittlement Properties of Austenitic Fe-30Mn-0.2C(-1.5Al) High-Manganese Steels for Cryogenic Applications

극저온용 오스테나이트계 Fe-30Mn-0.2C(-1.5Al) 고망간강의 수소 취화 특성

  • Lee, Sang-In (Department of Materials Science and Engineering Seoul National University of Science and Technology) ;
  • Lee, Ji-Min (Department of Materials Science and Engineering Seoul National University of Science and Technology) ;
  • Hwang, Byoungchul (Department of Materials Science and Engineering Seoul National University of Science and Technology)
  • 이상인 (서울과학기술대학교 신소재공학과) ;
  • 이지민 (서울과학기술대학교 신소재공학과) ;
  • 황병철 (서울과학기술대학교 신소재공학과)
  • Received : 2018.09.12
  • Accepted : 2018.10.22
  • Published : 2018.11.30
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Abstract

This present study deals with the hydrogen embrittlement properties of austenitic Fe-30Mn-0.2C(-1.5Al) high-manganese steels for cryogenic applications. They were electrochemically charged with hydrogen and then subjected to tensile tests for evaluating hydrogen embrittlement behavior. Tensile test results showed that after hydrogen charging the tensile strength and elongation of the Al-free steel were more remarkably decreased with increasing current density when compared to the Al-added steel. After hydrogen charging of the Al-added steel, it was found that the measured hydrogen content was small and silver particles were relatively less decorated. Therefore, the Al-added steel has a superior hydrogen embrittlement resistance to the Al-free steel because the addition of Al suppresses the injection of hydrogen during electrochemical hydrogen charging.

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References

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