电磁搅拌工艺对Mg-Zn-Y-Mn合金显微组织和力学性能的影响  

Effect of Electromagnetic Stirring Process on Microstructure and Properties of Mg-Zn-Y-Mn Alloy

作　　者：马彦彬 张金山[1] 张龙龙[1] MA Yan-bin;ZHANG Jin-shan;ZHANG Long-long(College of Materials Science and Engineerin;Taiyuan University of Technology, Taiyuan 030024, Shanxi, China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《铸造》2018年第7期616-621,共6页Foundry

摘　　要：系统研究了电磁搅拌对含Ti B2的Mg94Zn2.5Y2.5Mn1合金显微组织和力学性能的影响。结果表明:电磁搅拌在细化合金晶粒的同时,还可以改变长周期相和W相的生长方式,并且促进长周期相的形成。此外,电磁搅拌可以消除合金中溶质偏析现象。在优化电磁搅拌工艺后,合金平均晶粒尺寸为18.1μm,长周期相的体积分数达到31.1%,且具有最佳的力学性能,其抗拉强度达到265 MPa,伸长率达到16.3%。The effect of electromagnetic stirring on the microstructure and mechanical properties of Mg94Zn2.5Y2.5Mn1 alloy containing TiB2 was studied systematically. The results show that electromagnetic stirring could not only refine the microstructure of alloy, but also transform the symbiotic growth mode of long-period stacking ordered （LPSO） structure and W phase, promote the formation of long period phase. In addition, solute segregation in the alloy was eliminated. The average grain size was 18.1 μm and the volume fraction of long period phase was 31.1% in the alloy after optimizing the electromagnetic stirring process. The alloy obtained optimal mechanical properties of tensile strength of 265 MPa and elongation of 16.3%, respectively.

关 键 词：镁合金 长周期 微观组织 力学性能 电磁搅拌 

分 类 号：TG292[金属学及工艺—铸造]