非線形なsin^2ψ線図をもつ材料のX線応力測定法

概要

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An X-ray diffraction technique for measurement of stress of materials having a nonlinear sin^2 ψ diagram was proposed. A specimen was prepared from a cold-rolled austenitic stainless steel JIS type SUS304. Various stresses σ_a were applied to the specimen and peak positions of diffraction lines were measured at seven ψ angles. Peak positions oscillated with sin^2 ψ. A straight line was fitted to oscillatory peak positions in the sin^2 ψ diagram for each applied stress σ_a. The straight lines for various applied stresses intersect at a point in the sin^2 ψ diagram. The slope M and the intercept N of the straight lines vary in proportion to an applied stress σ_a. The stress constants K and L can be determined experimentally as the reciprocals of the slope of the strtaight lines of M and N versus σ_a, respectively. The stress and the stress constants can also be determined from a straight line connecting two end points in the sin^2 ψ diagram.
一般社団法人日本機械学会の論文
1998-07-25