イメ－ジングプレ－トを用いたマクロ・ミクロ応力のＸ線測定および(α+γ)二相ステンレス鋼への適用

金沢大学人間社会研究域人間科学系X-ray stress measurement of a composite material using a diffraction ring detected by a two dimensional detector was studied. The merit of the method is the reduction of time required for the X-ray measurement. A theoretical background of the method for determining phase stresses, macro- and microstresses from one diffraction ring was given in the first section of the paper. An experiment on the applicability of the method to a damaged layer of ferritic and austenitic dualphase stainless steel after grinding was also described. The depth profiles of residual macro- and microstresses were obtained from phase stresses. Plastic strains, which can be measured using the Eshelby/Mori-Tanaka model, were also shown which results of the residual phase stresses were discussed. It was found that residual stresses in the surface layer which built up after grinding are mainly under the control of plastic strain rather than macrostress