OS05F096 Investigation of fatigue crack propagation behavior by CT with Synchrotron Radiation

Abstract

Investigation of fatigue crack propagation behavior is important for understanding the fatigue fracture of metal materials. The authors have applied computed tomography (CT) with synchrotron radiation (SR) of SPring-8 to the nondestructive observation of fatigue cracks in aluminum alloys. The results are summarized in this paper, which includes: (1) Fatigue crack initiation from a defect inside a specimen. (2) Influence of laser peening on the shape of fatigue cracks. (3) Interference between two fatigue cracks. (4) Comparison of CT image of a casting defect with optical microscope.