挤压变形对Mg_(95)Zn_(4.3)Y_(0.7)合金组织和性能的影响  

Effects of Extrusion Deformation on Microstructure and Properties of Mg_(95)Zn_(4.3)Y_(0.7) Alloy

作　　者：邵明星[1] 卢庆亮[1] 徐培好[1] 闵光辉[1] 

机构地区：[1]山东大学

出　　处：《特种铸造及有色合金》2006年第5期288-290,共3页Special Casting & Nonferrous Alloys

基　　金：山东省科技攻关项目(2004GG2203106)

摘　　要：研究了在250℃、不同挤压比下挤压变形对Mg95Zn4.3Y0.7合金组织及性能的影响。结果表明,Mg95Zn4.3Y0.7经过挤压变形后,合金中晶界处的共晶相破碎,弥散分布至晶粒内部,并且晶粒显著细化。同时,随着挤压比的增大,晶粒细化程度增加,合金的力学性能单调增加。当挤压比为16时,合金晶粒尺寸为5～8μm,抗拉强度为288.9MPa,显微硬度HV值为117.8。Effects of extrusion deformation on microstructure and properties of Mg95Zn4.3Y0.7 alloy were investigated at 250 ℃ with different extrusion ratios. The results show that the eutectic phase in the boundary of the extruded alloy is broken up to dispersively distribute into grain, obviously refining the grain size. Meanwhile, with increasing in extrusion ratio, the mechanical properties of the extruded alloy are improved due to grain refinement. With extrusion ratio of 16, results was observed such as grain size of 5~8 μm, tensile strength of 288.9 MPa and micro-hardness of 117.8.

关 键 词：Mg95 Zn4.3 Y0.7合金 共晶组织 变形 

分 类 号：TG113[金属学及工艺—物理冶金]