Materials develop as equipment upgrades,and aluminum-lithium alloys,as one of the key materials for aircraft body,have been researched as times call.Adding lithium to aluminum alloys reduces alloy density,increases elastic modulus,and leads to high strength,high corrosion resistance,and good weldability,thereby promoting the development of aluminum-lithium alloys.With lower density and higher strength compared with traditional aluminum alloys,aluminum-lithium alloys have signifrcant structureal weight reduction effects.Thus they have been widely used in power components,casings,and other parts of spacecraft as key strategic materials for the development of aerospace technology.This article reviews the development history of first to fourth generation aluminum-lithium alloys and their applications in the aerospace field.
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