Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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The Effect of Heat Input on Fracture Toughness(CTOD) in Submerged Arc Offshore Steel Weldments

해양구조용강재의 SA용접부에서 입열량이 파괴인성에 미치는 영향에 관한 실험적 연구

  • Kang, Sung-Won (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Myung-Hyun (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Shin, Yong-Taek (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Lee, Hae-Woo (Institute of Industrial Technology, Samsung Heavy Industres)
  • 강성원 (부산대학교 조선해양공학과) ;
  • 김명현 (부산대학교 조선해양공학과) ;
  • 신용택 (삼성중공업 생산기술연구소) ;
  • 이해우 (삼성중공업 생산기술연구소)
  • Published : 2004.12.01
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Abstract

The influence of heat input on fracture toughness was investigated in SAW weldments, which were prepared at two different welding conditions in API 2W Gr.50 and EN10225 5420. By examining the fracture initiation point, refined areas(ICHAZ and SCHAZ) in weld metal was identified as local brittle zone, in which M-A constituents and coarsed grain size were observed. Impact values showed the most significant difference at root portion, and CTOD transition temperature was related with impact values obtained at root portion. Hardness values in refined area were less than columnar microstructure about 20 HV5.

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References

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