疲労変形および破壊機構に関するX線的研究 : 二相合金のα相における回折線幅の結晶格子面依存性の究明について

概要

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In their previous papers, the authors made some studies of annealed 6-4 brass, and particularly investigated its changes in residual stress, in half-value breadth and in micro-structure, during its fatigue process under constant and varying stress amplitudes, and found that its second showed some peculiar phenomena. One of these results showed the dependency of the changes in diffraction line widths on its crystal lattice plane in its α-phase. The authors tentatively interpreted this phenomenon as resulting from the heterogeneity of fatigue deformation as in the case of plastic deformation. Considering the character of fatigue fracture, however, it is questionable to ascrible the variation in the change of half-value breadth on diffraction crystal lattice planes only to the heterogeneity of plastic deformation. The authors examined therefore, during his X-ray investigations of fatigue deformation and fracture mechanism, first, the relationship between the tensile and the fatigue deformation, and secondly, fracture as dependent on the presence of a second phase. Heterogeneity in the tensile deformation has been commonly indicated as anisotropy of crystal, that is, orientation factor μ. Accordingly, the authors attempted to make it clear whether this that conception was applicable to a case of fatigue deformation or not. In case the application failed what sort of factors would be required?
社団法人日本材料学会の論文
1965-12-15