CrKα線およびMoKα線による冷間圧延 : 集合組織材のX線応用測定(<小特集>X線材料強度小特集)

概要

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In the case of X-ray stress measurement of textured materials, the lattice strain distribution usually shows a nonlinear relation against sin^2ψbecause of the elastic anisotropy of crystals. In the present study, CrKα and MoKα characteristics X-rays were used for the investigation of cold-rolled low carbon steels. The non-linearity of sin^2ψ diagram which is observed on the 211 diffraction was examined after plastic elongation as well as under elastic loading. The non-linearity of d-sin^2ψ diagram for 211 diffraction by CrKα radiation was intensified with increasing elastic loading. Furthermore, the non-linearity was found to be more remarkably than that expected from the elastic anisotropy when the specimen was once suffered plastic elongation. On the other hand, it was found that the lattice strain distribution obtained from the 732+651 diffraction by MoKα radiation showed good linearity in the sin^2ψ diagram because of deep penetration depth of MoKα radiation and a high multiplicity factor of highly indexed diffraction plane. It was also found that the X-ray elastic constants for 732+651 diffraction clearly depended on the rolled ratio and sample orientation to the rolled direction of the specimen.
社団法人日本材料学会の論文
1991-07-15