日本機械学会論文集 A編
Online ISSN : 1884-8338
Print ISSN : 0387-5008
Sin2φ線図の非線形性解析によるショットピーニング鉄鋼材の非破壊残留応力分布評価
柳瀬 悦也西尾 光司楠見 之博新井 和夫秋庭 義明田中 啓介
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2003 年 69 巻 682 号 p. 993-1000

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A new method of nondestructive estimation of the in-depth distribution of residual stresses is proposed by using monochromatic high-energy X-rays from synchrotron radiation source SPring-8. The X-ray with 72 keV energy was used for stress measurements of shot-peened steel samples, whose compressive zone extended a few hundred micrometers below the surface. The measurements were carried out by using the sin2 φ method in a Ψ-diffractometer. The obtained results of sin2 φ diagrams showed nonlinearity due to the in-depth distribution of the residual stress. The stress distribution below the surface was estimated from the analysis to the nonlinearity of sin2φ dragrams. The estimated stress distribution agreed well with that determined by the conventional sin2 φ method with Cr-Kα radiation corrected by surface removal effect.

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