In-Situ Neutron Diffraction Study on Tensile Behavior of LPSO Mg–Zn–Y Alloys

Abstract

Tensile behavior of single-phase 18R-Long period stacking ordered structure (LPSO) Mg–Zn–Y alloys and two-phase Mg–Zn–Y alloys which consist of Mg matrix and 18R-LPSO phase were studied by in-situ pulsed-neutron diffraction technique under tensile stress. Anisotropic behavior between the a-axis and c-axis in the 18R-LPSO structure was observed for the single-phase LPSO Mg–Zn–Y casted alloy from the elastic region under tensile stress. On the other hand, two-phase Mg–Zn–Y alloys of low 18R-LPSO phase concentration, which were produced by extrusion, behave isotropic until the yield point under tensile stress, and the 18R-LPSO phase acts as a strengthening phase in the plastic region.