Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Cryogenic Charpy Impact Test based on GTAW Method of AISI 304 Stainless Steel for LNG Pipeline

AISI 304 스테인리스 강으로 제작된 LNG배관 용접부의 극저온 샤르피 충격시험

  • Kim, Jeong-Hyeon (Dept. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Choi, Sung-Woong (Dept. of Extreme Energy Systems, Korea Institute of Machinery and Materials) ;
  • Park, Doo-Hwan (Dept. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Jae-Myung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
  • 김정현 (부산대학교 공과대학 조선해양공학과) ;
  • 최성웅 (한국기계연구원 극한에너지기계연구실) ;
  • 박두환 (부산대학교 공과대학 조선해양공학과) ;
  • 이제명 (부산대학교 공과대학 조선해양공학과)
  • Received : 2014.04.21
  • Accepted : 2014.06.20
  • Published : 2014.06.30
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Abstract

AISI 304 austenitic stainless steel is widely used for LNG pipes for LNG transmission thanks to its good metallurgical and mechanical properties. In the present research, impact toughness of a gas tungsten arc welded AISI 304 stainless steel pipe was evaluated between room and liquid nitrogen ($-196^{\circ}C$) test temperatures. In addition, a comparative study was made of the fracture behavior of FCC crystal structured stainless steel weldments and BCC crystal structured mild steels(A-grade and SS400). The results showed a slight decrease in the impact energy of the AISI 304 base metal, heat affected zone(HAZ), and welded zone with decreasing test temperature. In addition, the welded metal has the highest absorbed impact energy, followed by HAZ and the base metal.

Keywords

References

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