机械搅拌对含准晶相Mg_(93)Zn_6Y_1合金的显微组织及性能影响  

Effect of Mechanical Stirring on Microstructure of Mg_(93)Zn_6Y_1with Quasicrystal and Its Performance

作　　者：万迪庆[1] 利助民 叶舒婷[1] 

机构地区：[1]华东交通大学机电工程学院,江西南昌330013

出　　处：《铸造》2016年第2期179-183,共5页Foundry

基　　金：国家自然科学基金(51361010)资助

摘　　要：通过光学显微镜、扫描电镜、透射电镜分析和力学性能测试研究了机械搅拌对Mg_(93)Zn_6Y_1合金的显微组织及力学性能的影响。发现机械搅拌后,α-Mg枝晶破碎,呈菊花状,部分球化,游离分布于组织中;晶粒细化,组织均匀。对不同机械搅拌参数下的Mg_(93)Zn_6Y_1合金进行了力学性能测试。通过改变机械搅拌参数,发现Mg_(93)Zn_6Y_1合金硬度可增加13.8%,耐磨性能及阻尼性能均得到提高。The effects of mechanical stirring on the microstructure and mechanical properties of Mg93Zn6YI alloy were investigated by means of optical microscope （OM）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and mechanical properties testing. By mechanical stirring, α-Mg dendrite was broken, presented rosette-like morphology and a part of α-Mg dendrite was spheroidized. Beside,α-Mg dendrite is free distribution in the microstructure. At the same time, the volume fraction of quasicrystal was increased as well as grain refinement and uniform microstructures are gained. The mechanical performance tests of Mg93Zn6Y1 alloy were measured under the different mechanical stirring parameters. By changing the parameters of mechanical stirring, Mg93Zn6Y1 alloy hardness can be increased by 1 3.8%. Furthermore, wear resistance and damping performance were improved.

关 键 词：Mg93Zn6Y1 准晶相 机械搅拌 

分 类 号：TG146.22[一般工业技术—材料科学与工程]