A Study on the Evaluation of Welding Residual Stress of Pipeline in Power Plants by Indentation Methods

연속압입시험법에 의한 발전용 배관 용접부의 잔류응력 평가

It is widely recognized that the residual stress of weldment affects steel construction and causes fracture initiation of welded structures. It is necessary to know since the power plants adopt a variety of welding processes distribution and magnitude of residual stresses. Therefore the purpose of present study is to investigate the validity of the indentation method to measure residual stresses of steel plates by residual stresses measured form the specimens of hot reheater pipes, cold reheater pipes and feed water lines used in power plants.