Fatigue Damage Evaluation for Harmonic Structured SUS304L by Diffraction Contrast Tomography Using Ultra-bright Synchrotron Radiation-X ray

Abstract

A technique for three dimensional grain mapping of polycrystal, called X-ray diffraction contrast tomography (DCT), has been proposed and developed to evaluate damage in fatigue process in recent years. In the present study, the DCT was conducted for SUS304L with harmonic structure during low-cycle fatigue tests. The change in misorientation in SUS304L with harmonic structure is less than that in SUS316L balk material. Furthermore, the change of the cross-sectional area in the harmonic structured SUS304L was also measured using μCT imaging during fatigue tests.