Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Analysis of CTOD Tests on Steels for Liquefied Hydrogen Storage Systems Using Hydrogen Charging Apparatus

수소 장입 장치를 활용한 액체수소 저장시스템 강재의 CTOD 시험 분석

  • Ki-Young Sung (Offshore Industries R&BD Center, Korea Research Institute of Ship & Ocean Engineering) ;
  • Jeong-Hyeon Kim (Hydrogen Ship Technology Center, Pusan National Univ.) ;
  • Jung-Hee Lee (Offshore Industries R&BD Center, Korea Research Institute of Ship & Ocean Engineering) ;
  • Jung-Won Lee (Offshore Industries R&BD Center, Korea Research Institute of Ship & Ocean Engineering)
  • 성기영 (선박해양플랜트연구소 해양플랜트산업지원센터) ;
  • 김정현 (부산대학교 수소선박기술센터) ;
  • 이정희 (선박해양플랜트연구소 해양플랜트산업지원센터) ;
  • 이정원 (선박해양플랜트연구소 해양플랜트산업지원센터)
  • Received : 2023.09.04
  • Accepted : 2023.09.25
  • Published : 2023.10.31
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Abstract

Hydrogen infiltration into metals has been reported to induce alterations in their mechanical properties under load. In this study, we conducted CTOD (Crack Tip Opening Displacement) tests on steel specimens designed for use in liquid hydrogen storage systems. Electrochemical hydrogen charging was performed using both FCC series austenitic stainless steel and BCC series structural steel specimens, while CTOD testing was carried out using a 500kN-class material testing machine. Results indicate a notable divergence in behavior: SS400 test samples exhibited a higher susceptibility to failure compared to austenitic stainless steel counterparts, whereas SUS 316L test samples displayed minimal changes in displacement and maximum load due to hydrogen charging. However, SEM (Scanning Electron Microscopy) analysis results presented challenges in clearly explaining the mechanical degradation phenomenon in the tested materials. This study's resultant database holds significant promise for enhancing the safety design of liquid hydrogen storage systems, providing invaluable insights into the performance of various steel alloys under the influence of hydrogen embrittlement.

Keywords

Acknowledgement

본 논문은 한국해양과학기술원 부설 선박해양플랜트연구소 주요사업으로 진행 중인 "집중형 부유식 해상 전처리 공정 Topside 플랫폼 기본설계 및 액화수소 다층 단열시스템 핵심기술 개발" 과제에 의해 수행되었습니다(PES4804).

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