Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Fracture Toughness Prediction of API X52 Using Small Punch Test Data in Hydrogen at Low Temperatures

소형펀치 시험을 이용한 API X52 저온 수소환경 파괴인성 예측

  • Jae Yoon Kim ;
  • Ki Wan Seo ;
  • Yun Jae Kim ;
  • Ki Seok Kim
  • 김재윤 (고려대학교 기계공학부) ;
  • 서기완 (고려대학교 기계공학부) ;
  • 김윤재 (고려대학교 기계공학부) ;
  • 김기석 (POSCO 철강솔루션연구소)
  • Received : 2023.11.17
  • Accepted : 2023.12.18
  • Published : 2023.12.30
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Abstract

Hydrogen embrittlement of a pipe is an important factor in hydrogen transport. To characterize hydrogen embrittlement, tensile and fracture toughness tests should be conducted. However, in the case of hydrogen-embrittled materials, it is difficult to perform tests in hydrogen environment, particularly at low temperatures. It would be useful to develop a methodology to predict the fracture toughness of hydrogen-embrittled materials at low temperatures using more efficient tests. In this study, the fracture toughness of API X52 steels in hydrogen at low temperatures is predicted from numerical simulation using coupled finite element (FE) damage analyses with FE diffusion analysis, calibrated by analyzing small punch test data.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 RS-2023-00245737)

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