한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제47권1호
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  • Pages.33-38
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  • 2014
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
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수소주입시킨 680MPa DP강의 나노인덴터 시험

Nanoindenter Test of 680MPa Dual Phase Steel Charged with Hydrogen

  • 최종운 (서울과학기술대학교 신소재공학과) ;
  • 박재우 (서울과학기술대학교 에너지환경대학원) ;
  • 강계명 (서울과학기술대학교 신소재공학과)
  • Choi, Jong-Woon (Department of Materials Science and Engineering, Seoul National University of Science & Technology) ;
  • Park, Jae-Woo (Department of New Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology) ;
  • Kang, Kae-Myung (Department of Materials Science and Engineering, Seoul National University of Science & Technology)
  • 투고 : 2014.02.06
  • 심사 : 2014.02.24
  • 발행 : 2014.02.28
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초록

Nanoindentater tests were conducted to conducted nanoindentation microhardness of the individual phase of ferrite and martensite of 680MPa dual-phase (DP) steel charged with hydrogen. Hydrogen was charged by electrochemical method with current densities of 150, $200mA/cm^2$ for charging times of 5, 10, 25, 50 hours, respectively. Nanoindenter test results showed that the nanoindentation microhardnesses of ferrite phase of DP steel were varied from min. 1.58 GPa to max. 2.82 GPa, and the nanoindentation microhardnesses of martensite phase varied from min. 3.19 GPa to max. 5.16 GPa with the variation of hydrogen charging conditions. It was observed that the variations of the nanoindention microhardnesses of martenstie phase were higher than those of ferrite phases. It was thought that martensite phase in the 680MPa DP steel was more sensitive than ferrite phase to hydrogen embrittlement.

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참고문헌

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피인용 문헌

  1. Small Punch Test of TRIP Steel Charged with Hydrogen under Different Electrolyte Condition vol.19, pp.1, 2015, https://doi.org/10.7842/kigas.2015.19.1.64