繊維配向を有する立方晶多結晶体のX線応力測定法

抄録

A new method of X-ray stress measurement was proposed for cubic polycrystals having the [111] fiber texture with the fiber axis perpendicular to the specimen surface. The relation between the strain measured by the X-ray method and the stress was derived on the bases of Reuss and Voigt models. The procedure to determine the residual stresses in aluminum thin films having the [111] fiber texture was presented. The X-ray strain was measured at the inclination angle ψ=0° and 70.5° for 222 diffraction, and ψ=29.5° and 58.5° for 311 diffraction. The values of in-plane stresses, σ₁₁, σ₂₂ and σ₁₂, and out-of-plane stress, σ₃₃, were determined from the measured strains. For the case of equi-biaxial stresses, i.e. σ₁₁=σ₂₂=σ, both models give the identical relation between the X-ray strain and sin²ψ. The stress can be determined from the slope of the linear relation.