Study on Residual Stress Distribution in Thick Plate Welded Material Using Indentation Equipment

압입시험기를 이용한 후판용접재의 잔류응력 분포에 관한 연구

Huh, Sun-Chul;Kim, Gwi-Nam;Lee, Jong-Seok;Park, Cheol-Hong;Park, Joun-Sung;Park, Won-Jo

  • Received : 2011.09.07
  • Accepted : 2011.12.23
  • Published : 2011.12.31


Recently, the production of shipbuilding and offshore plant industries, with a trend toward large structures, has led to an increased use of high strength ultra-thick plates. The use of ultra-thick plates increases the welding tasks, and the welding process generates distortion and residual stress in the weldment because of the rapid heating and cooling. Welding distortion and residual stress in the welded structure resulte in many troubles such as deformation and life deterioration. In particular, the welding residual stress has an important effect on welding deformation, fatigue, buckling strength, brittleness, etc. The purpose of this study was to evaluate the residual stress at a multi-pass weldment using an experimental method for EH36 high-tension steel. In this experimental method, AIS3000 was used to measure the residual stress of a welded part, HAZ, and base metal; EPMA and XRD were used to study the material properties.


AIS3000;Heat affected zone(HAZ);Residual stress;X-ray diffractometry(XRD);Electron prove micro analyzer(EPMA);Thick plate welded material


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Supported by : 한국과학재단. 한국산업진흥원