RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Effect of Acicular Ferrite and Bainite in API X70 Steel Obtained After Applying a Heat Treatment on Corrosion and Cracking Behaviour

        L. R. Jacobo,R. García‑Hernández,V. H. López‑Morelos,A. Contreras 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10

        The effect of acicular ferrite (AF) and bainite (B) obtained by heat treatment (HT) applied to an API X70 steel on corrosionresistance and stress corrosion cracking (SCC) susceptibility was evaluated through polarization curves and slow strain ratetests respectively, in NS4 solution and congenital water (CW). The HT was carried out at 1050 °C for 15 and 30 min followedby water quenching. Change of ferrite–perlite to AF and B was observed as result of heat treatment applied to X70steel. Effect of HT time in terms of microstructure obtained was analysed. The mechanical properties obtained by the HTare higher than X100 steel. HT-30 min improve the corrosion resistance of X70 steel exposed to both solutions, which arerelated to coarse and homogeneous microstructure of AF and B. Localized corrosion was observed in the steel exposed toboth solutions. HT-15 min improve mechanical properties and higher content of fine AF, but decreases SCC resistance. Steel with higher content of fine AF microstructure is more susceptible to SCC. SCC indexes revealed that the heat-treatedsteel could be susceptible to SCC in CW confirmed by the secondary cracks observed. The SCC mechanism was hydrogenembrittlement. Meanwhile, steel HT by 15 min exposed to NS4 solution could be susceptible to SCC. Crack growth rate washigher in steel HT by 15 min, which are related to more fine and brittle AF microstructure.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼