微量Y对Al-Li合金的析出相和力学性能的影响  

EFFECT OF Y ON PRECIPITATION AND MECHANICAL PROPERTIES OF Al-Li ALLOY

作　　者：桂全红 蒋晓军[1] 马禄铭[1] 梁国军[1] 邢中枢[1] 李依依 

机构地区：[1]中国科学院金属研究所

出　　处：《金属学报》1993年第4期A165-A170,共6页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：研究了Y(0.1、0.5wt-％)对Al-Li-Cu—Mg—Zr合金析出相与拉伸性能的影响结果表明:Y可使铸态合金晶粒细化:促进β′(Al_3Zr)相析出:抑制δ′(Al_3Li)相的长大速度:使S′(Al_2CuMg)相的分布均匀化.添加0.1％Y能改善合金塑性而不降低强度:添加0.Effect of Y, containing 0.1 or 0.5 wt-%, on precipitation and tensile proper-ties of Al-Li-Cu-Mg-Zr alloy has been studied. An addition of Y may refine the grain size,promote the β′-phase precipitation, improve S′-phase distribution, and restrain the growthof δ′-phase. Tensile tests at room temperature indicate that 0.1 wt-% Y addition may in-crease the ductility but no more strength. However, 0.5 wt-%Y contained alloy exhibits high-er strength without reducing ductility.

关 键 词：析出相 强度 塑性 铝锂合金 钇 

分 类 号：TG146.2[一般工业技术—材料科学与工程]