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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0.5％Y可使强度提高而塑性不降低
The effect of Y (0.1,0.5wt-%) on the phase and tensile properties of Al-Li-Cu-Mg-Zr alloy was studied. The results show that: (Al3CuMg) phase homogenized.Adding 0.1% Y can improve the ductility of the alloy without decreasing the strength: Adding 0.5% Y can improve the strength and plasticity Do not reduce