炭素鋼予ひずみ材およびショットピーニング材の疲労試験における残留応力変化と電子顕微鏡による表面連続観察

概要

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In this paper, the changes in residual stress of 10% prestrained or shot-peened carbon steel specimens in the fatigue process were measured by the X-ray diffraction method, and the behavior of slip band initiation and crack initiation in the early fatigue process was investigated by successive observations of replicas of the specimen surface, using an optical microscope and an electron microscope. The residual stress of both prestrained and shot-peened specimens decreased rapidly in the early stage of the fatigue process, and then remained constant up to fracture. The behavior of slipband and crack initiation in the prestrained and the shot-peened specimens is similar. In these two kinds of specimens, many slip bands and cracks originated within grains rather than along the grain boundary.
社団法人日本機械学会の論文
1993-12-25