Testing for Residual Stress of Steel Bifurcated Pipe in Hydropower Station after Vibration Stress Relief by X-ray Diffraction Method

Vibration stress relief (VSR) was introduced to release the welding residual stress of bifurcated pipe in hydropower station,and X-ray diffraction residual stress testing method was also introduced to evaluate the effect of VSR. An example was given about applying the X-ray diffraction method to test residual stress of the joint of bifurcated pipe.