High Strength and Excellent Ductility of AZ80 Magnesium Alloy Cabin Component Developed by W-Shaped Channel Extrusion and Subsequent T6 Heat Treatment

The AZ80 magnesium (Mg) alloy cabin component with high strength and excellent ductility was developed by W-shaped channel extrusion (WCE) at 350 °C subsequent T6 heat treatment. effect of WCE process on the microstructure mechanical properties experimentally investigated, age-hardening behavior evolution during treatment revealed. Due to introduction multi-stage asymmetric severe shear deformation along annular channel, average grain size extruded could be effectively refined 4.7 μm. Besides, β phase particles were dynamically precipitated from fine boundaries extrusion, which hindered growth, but worsen material plasticity. After treatment, eventually improved a yield (YS) 218 MPa ultimate tensile (UTS) 344 elongation (EL) 14.5%. It revealed that rod/lath- needle-shaped continuous (CP) finer after more effective in hindering movement dislocations strengthened than lamellar discontinuous (DP). dispersed grains, annihilation dislocations, uniformly distributed grains re-dissolution initial greatly contributed alloy. Moreover, also promoted basal plane most re-arranged direction, possibility non-basal slip activation further As result, UTS YS final increased 10% EL 7%, respectively.