In-Service Residual Stress Measurement Technique with Tow-Dimensional X-Ray Diffraction for Weld Metal in Structural Components
Yun WANG, Hisamitsu HATO, Toshikazu KIKUCHI and Atsushi CHIBA
Abstract:As known as typical texture material with coarse grain, weld metal or its vicinity meets difficulties in residual stress measurement especially using sin2method with conventional zero or one-dimensional X-ray diffraction. In this study a two-dimensional X-ray diffraction system based on cos method is developed for in-service residual stress measurement of weld metal in structural components. Validity of residual stress measurement using this system is verified by several confirming tests including nickel-based weld metal. Positioning jig is designed and fabricated for welds on the shroud support plate of boiling water reactor (BWR). Setup test on the mock-up of BWR bottom area shows the possibility of in-service measurement using this system. Key Words:Residual stress, X-ray diffraction, Two-dimensional, cos method, Imaging plate, In-service measurement, Nickel-based alloy, Weld metal, BWR(Boiling Water Reactor), Shroud support plateC