複相マグネシウム合金における格子ひずみ発達機構

抄録

Magnesium (Mg) alloys with long-period stacking ordered (LPSO) phase are potential candidates for next generation light-weight metallic materials because the wrought alloys show quite good mechanical properties compared with conventional Mg alloys. Whereas a number of researches on deformation behavior of LPSO-type Mg alloys have been done during last 20 years, understandings of active deformation modes of these alloys are still limited. In this study, active deformation modes during plastic deformation are examined based on evolution of lattice strain for both α-Mg phase and LPSO phase. Experimentally, lattice strains for various crystallographic planes were measured by in-situ neutron diffraction. The measured evolution of lattice strain was quantitatively evaluated by crystal plasticity analysis.