Magnesium Alloy(AZ31) Sheet Fabrication by Plastic Working

초록

In order to fabricate a magnesium alloy(AZ31) sheet, an extrusion followed by a rolling was carried out. Microstructural analysis was made and the mechanical properties during each process were also investigated by tensile and hardness tests. By an extrusion process of ingot-process billet, average grain size of billet was reduced from 91.2 to 28.2, and a furher reduction in grain size to 16.9 was obtained by subsequent rolling of extruded 5 mm thin slab. In the final step, a rolled sheet of 1 mm showed a remarkable refinement in grain size down to 8.8. Regarding mechanical properties, tensile strength and elongation for as-cast billet, as-extruded thin slab and as-rolled sheet increased from.