抄録
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.
