在自行研制的SF380大型喷射成形设备上制备了高Mg含量的Al-12Mg-0.5Mn合金,采用透射电镜(TEM)、扫描电镜电子背散射成像技术(EBSD)和室温拉伸方法研究了合金的微观组织和力学性能。研究结果表明:挤压态喷射成形Al-12Mg-0.5Mn合金位错密度低,室温拉伸强度和延伸率分别为445 MPa和9%;挤压态合金经50%热轧变形后位错密度显著提高,亚结构显著增多,合金的室温拉伸强度和延伸率分别达607 MPa和18%。 Al-12Mg-0.5Mn alloy with high Mg content was prepared on a self-developed SF380 large-scale injection molding equipment. The effects of the alloy Microstructure and mechanical properties. The results show that the dislocation density of extruded Al-12Mg-0.5Mn alloy is low, the tensile strength and elongation at room temperature are 445 MPa and 9% respectively, and the dislocation density Significantly increased, the substructure increased significantly, the room temperature tensile strength and elongation of the alloy reached 607 MPa and 18% respectively.