A Study on the Evaluation of Welding Residual Stress of Pipe used in Power Plant by Indentation Method

연속압입시험에 의한 발전소용 배관의 용접잔류응력 평가에 관한 연구

In this study, to verify the reliability of the indentation for measuring welding residual stresses to get in method we compared the results of the method with those measured by the saw cutting method. Also for the same purpose we used a 4-point bending test and confirmed the reliability of indentation method. The specimens used in this experiment are made with the same conditions for hot reheater pipes and cold reheater pipes used in the electric power plant. Therefore we could know that the results of the methods showed the reliability of the method to obtain welding residual stresses.