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为了与蓬勃发展的复合材料相抗衡,铝合金性能也在不断提高改进,并推出新的高性能铝合金,铝-锂合金8090就是其典型代表。早在20年代,德国已经尝试在铝合金中加入锂,并研制出具有2%锂和2.35%硅的铝-锂-硅合金,但由于时效特性差而没有成功。其后又尝试加入铜、锌等元素,但与当时航空工业广泛采用的杜拉铝相比没有明显的优点而作罢。
In order to compete with the flourishing composite material, the performance of the aluminum alloy is constantly improving and improving, and the new high-performance aluminum alloy is introduced. The aluminum-lithium alloy 8090 is the typical representative. As early as the 1920s, Germany had tried to add lithium to aluminum alloys and developed aluminum-lithium-silicon alloys with 2% lithium and 2.35% silicon, but failed due to poor aging characteristics. Later, he tried to add elements such as copper and zinc, but did not give any obvious advantages over Duralumin, which was widely used by the aviation industry at the time.