多結晶金属の変形と微視的格子ひずみ : 弾性および塑性異方性材料におけるX線測定ひずみについて

概要

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In the previous paper, the authors studied on the deformation of polycrystalline copper by X-ray diffraction, and it was suggested that the difference in work-hardening rate of each grain due to its orientation played an important role in the deformation behaviour of polycrystalline copper. That is, in such metals as copper, the plastic anisotropy of crystals must be considered in the problem of plasticity of polycrystals.G.B. Greenough have introduced the relation between the microscopic residual stress among the grains resulting from the uniaxial tension (stress of the 2nd kind) and the residual lattice strains measured by the X-ray diffraction from several crystal planes perpendicular to stress axis. However, Greenough assumed, according to Taylor's theory, that the work-hardening of the grain depended only on the total shear strain on the slip planes, which does not seem to be adequate for such metals as copper. Furthermore, Greenough put assumptions that the total axial strain was equal in all grains under the loading condition and the crystal was elastically isotropic.In this paper, the basic relation between the strains measured by X-rays and the crystal plasticity was investigated in more general case, namely, in arbitrary state of mutual interference between the grains and for elastically and plastically anisotropic metals.
社団法人日本材料学会の論文
1967-01-15