铝合金是典型的轻结构材料,但是含Li的铝合金比重更小,由于它可用来制作刚度要求高的飞机结构件,正受到人们的重视。 在铝合金中添加1%重量Li可使合金的比重降低3%,弹性模量约提高6%,比强度约增加9%。另外,Li在Al中的固溶度大,所以具有时效硬化作用。单相 Aluminum alloy is a typical lightweight structural material, but the proportion of Li-containing aluminum alloy smaller, because it can be used to make aircraft structures with high stiffness requirements, is receiving people’s attention. Adding 1 wt% Li into the aluminum alloy can reduce the specific gravity of the alloy by 3%, increase the elastic modulus by about 6%, and increase the specific strength by about 9%. In addition, since Li has a large solid solubility in Al, it has an age-hardening effect. Simplex