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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第4期A165-A170,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
析出相
强度
塑性
铝锂合金
钇
Al-Li alloy
Y
precipitation
strength
ductility
