o f the uni-directionally machined metallic materials are often curved and splitted. This phenomenon In order to solve this problem, Dolle and Cohen proposed a new method which provides more detailed information on the rather complicated stress states. This study was carried out to make clear the effect of experimental conditions on the accuracy of stress measurement of ground and cut layers of steel using the Dolle-Cohen's method, and confirmed that this method is an effective one for this

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... ose. Table I . Chemical composition of materials (wt. %).