2022-05-17T04:58:05Zhttps://niigata-u.repo.nii.ac.jp/oaioai:niigata-u.repo.nii.ac.jp:000029242021-03-01T20:21:26ZEvaluation of Residual Stress Distribution in Shot-Peened Steel by Synchrotron Radiation放射光によるショットピーニング材の残留応力分布評価放射光によるショットピーニング材の残留応力分布評価秋庭, 義明39844田中, 啓介39845鈴木, 賢治39846柳瀬, 悦也39847西尾, 光司39848楠見, 之博39849尾角, 英毅39850新井, 和夫39851X-ray stress measurementSynchrotron radiationShot peeningResidual stressHigh energy X-raysThe in-depth distribution of residual stresses in shot-peened steels was measured by using high energy X-rays from a synchrotron radiation source. The relation between the 2θ and sin^2Ψ was obtained with the side-inclination method (Ψ diffractometer). The distribution of residual stresses was first evaluated by the nonlinearity of the sin^2Ψ diagram by a simplex method. The estimated stress agreed with the distribution determined through the sin^2Ψ method by using Cr-Kα radiation combined with the conventional surface removal method. A new method was proposed to estimate the stress value of the distributed residual stress. The new method was a combination of the side-inclination method and the iso-inclination method (ω diffractometer) to maintain the penetration depth constant. The sin^2Ψ diagram could be approximated by the linear relationship. The evaluated stress distribution agreed well with the distribution obtained by the surface removal method.journal article日本材料学会2003-07application/pdf材料752764769材料AN0009617505145163https://niigata-u.repo.nii.ac.jp/record/2924/files/ZQ_52(7)_764-769.pdfjpn