往复挤压对Mg-0.85Zn-0.15Y-0.6Zr铸态组织和力学性能的影响

Effects of Reciprocating Extrusion on Microstructures and Mechanical Properties of as-Cast Mg-0.85Zn-0.15Y-0.6Zr Alloys

摘要:

研究了往复挤压对准晶增强Mg-0.85Zn-0.15Y-0.6Zr铸态合金显微组织及力学性能的影响。结果表明，往复挤压可大幅度细化Mg-0.85Zn-0.15Y-0.6Zr铸态合金组织，且使I相等相对均匀地分布在a-Mg基体中。同铸态合金相比，挤压后Mg-0.85Zn-0.15Y-0.6Zr合金的屈服强度、抗拉强度和延伸率分别提高了75.8%，43.2%和35%

Abstract:

Effects of reciprocating extrusion on the microstructures and mechanical properties of as-cast Mg-0.85Zn-0.15Y-0.6Zr alloys enforced by quasicrystal particles were investigated by OM, SEM and XRD. The results show that the reciprocating extrusion can greatly refine the microstructure of as-cast Mg-0.85Zn-0.15Y-0.6Zr alloy, and make I phase relatively uniformly distribute in the α-Mg matrix. Compared with that of the as-cast alloy, the yield strength, tensile strength and elongation of the Mg-0.85Zn-0.15Y-0.6Zr magnesium alloys after reciprocating extrusion are increased by 75.8%, 43.2% and 35%, respectively