铝锂合金的合金化与微观组织演化  

Alloying and microstructural evolution of Al-Li alloys

作　　者：郑子樵[1] 李劲风[1] 陈志国[1] 李红英[1] 李世晨[1] 谭澄宇[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2011年第10期2337-2351,共15页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2005CB623705);国家自然科学基金资助项目(59771009;50271084;50801067)

摘　　要：评述了铝锂合金的发展历程和应用以及我国铝锂合金研究所取得的成果。阐述了第3代铝锂合金的成分、微观组织和性能特点,讨论了合金化元素在调控铝锂合金微观组织进而改善性能方面的作用。大量研究表明,这些合金化元素可改变铝锂合金中原有析出相的大小、形状、分布,或刺激新强化相的析出,也可以细化晶粒、控制再结晶和晶粒取向。时效析出过程的本质和动力学在很大程度上取决于合金化元素之间的交互作用和合金原子的团簇化过程。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.

关 键 词：铝锂合金 合金化 微观组织 时效硬化 析出相 

分 类 号：TG146.2[一般工业技术—材料科学与工程]