抄録
Strain Age hardening has an anisotropy in mechanical property, the stress-strain curve of specimen along the pre-strained direction shows discontinuous yielding behavior while orthogonal one shows continuous yielding. The residual stress caused by inhomogeneous deformation is pointed out as a cause of strain age hardening anisotropy, however detailed mechanism has not been clarified. In this study, we focused on heterogeneous deformation and evaluated the heterogeneous deformation behavior of crystal grains by KAM (Kernel Average Misorientation) and GROD (Grain Reference Orientation Deviation ) obtained by EBSP (Electron Backscatter Diffraction Pattern) analysis. As a result, KAM average value was lower in the orthogonal direction material and ,KAM in the crystal grain was also lower. GROD of the orthogonal direction material showed a lower value (0 ° to 2 °). It was suggested that the behavior of grains shown by these KAM and GROD analysis is affected by strain loading path, resulted in inhomogeneous deformation behavior of crystal grains.
