(中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 評(píng)述了鋁鋰合金的發(fā)展歷程和應(yīng)用以及我國(guó)鋁鋰合金研究所取得的成果。闡述了第3代鋁鋰合金的成分、微觀組織和性能特點(diǎn)，討論了合金化元素在調(diào)控鋁鋰合金微觀組織進(jìn)而改善性能方面的作用。大量研究表明，這些合金化元素可改變鋁鋰合金中原有析出相的大小、形狀、分布，或刺激新強(qiáng)化相的析出，也可以細(xì)化晶粒、控制再結(jié)晶和晶粒取向。時(shí)效析出過(guò)程的本質(zhì)和動(dòng)力學(xué)在很大程度上取決于合金化元素之間的交互作用和合金原子的團(tuán)簇化過(guò)程。
關(guān)鍵字: 鋁鋰合金；合金化；微觀組織；時(shí)效硬化；析出相
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The development history of Al-Li alloys and the achievements gained in China were reviewed. The composition, microstructure and properties of the third generation Al-Li alloys were reviewed as well, and in particular, the effect of alloying elements on the microstructure and the further improvement of the properties was discussed in detail. Numerous studies demonstrate that the alloying elements can modify the dimension, morphology and distribution of phases, or stimulate the precipitation of the new phase in Al-Li alloys, and in addition, are also able to refine the grain structure, control the recrystallization and grain orientation. Essentially, the nature and kinetics of the precipitation process depend on the interaction of alloying elements and the co-clustering sequence.
Key words: Al-Li alloy; alloying; microstructure; aging hardening; precipitation
