稀土Y变质对过共晶合金MG-33Al合金组织的影响  

Effect of Rare Earth Y Modification on Microstructure of Hypereutectic Mg-33Al Alloy

作　　者：杨建东[1] YANG Jian-dong(Xian Aviation Vocational and Technical College,Xian 710089,Shaanxi,China)

机构地区：[1]西安航空职业技术学院

出　　处：《合成材料老化与应用》2020年第1期74-76,共3页Synthetic Materials Aging and Application

基　　金：陕西西安航空职业技术学院科研计划项目立项项目Mg-6Al-xGd-xNd-xY-xZn合金的组织及高温蠕变性能研究

摘　　要：通过研究稀土元素Y对Mg-33Al进行变质处理,发现共晶晶胞组织以典型的层片状和杆状形态析出,显微组织中出现了大量交错分布的杆状特征的共晶组织,稀土元素Y在合金中以Al2Y金属间化合物形式存在,直径尺寸在3μm^7μm之间,弥散分布于共晶组织晶界处,局部出现偏聚现象。By studying the modification of rare earth element Y to Mg-33Al,it was found that the eutectic cell structure precipitated in a typical lamellar and rod shape.A large number of staggered rod-shaped eutectic structures appear in the microstructure.In the eutectic structure,the rare earth element Y exists in the form of Al2Y intermetallic compound in the alloy,and the diameter is between 3μm and 7μm.The dispersion is distributed at the grain boundaries of the eutectic structure,and partial segregation occurs.

关 键 词：稀土Y变质 过共晶镁合金 显微组织 

分 类 号：TG146.2+1[一般工业技术—材料科学与工程]