放射光DCTインライン計測による金属材料中のミスオリエンテーション評価

抄録

A technique to observe three-dimensional grain mapping of polycrystals, called X-ray diffraction contrast tomography (DCT) has been proposed and developed in recent years. It is possible to evaluate fatigue damage by total misorientation β of each grain which is calculated from diffraction spread angle measured in DCT measurement. In this study, Fatigue test was conducted on the beam-line, and DCT measurement was performed without removing the specimen from the fatigue testing machine. The change of total misorientationβ in each grain was investigated during high cycle fatigue test for untreated SUS304.