압입시험기를 이용한 후판용접재의 잔류응력 분포에 관한 연구
Study on Residual Stress Distribution in Thick Plate Welded Material Using Indentation Equipment
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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.
Abstract
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.
참고문헌 (10)
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- Jang, J.I., "Application of Continuous Indentation Testing Method for Evaluation the Strength Performences of Weldment,Journal of KWS,Vol 20", Journal of KWS, 20(22) (2002)
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- 이해우, "후판 용접부 횡균열 발생에 미츠는 잔류응력의 영향", 대한용접접합학회지, 26(4), pp.41~43 (2008), 대한용접접합학회
- 정천영, "해양구조물 강 재의 다층 FCA용접에 의한 버트 용접부의 특성 및 피로균열 발생", 한국해양공학회 2010년도 추계학술대회 논문집, pp.353~356 (2010)