有色金属科学与工程2025，Vol.16Issue(5)：734-745,12.DOI:10.13264/j.cnki.ysjskx.2025.05.008
Li+Sc含量对Al-Li合金组织和性能的影响
Influence of Li and Sc content upon microstructure and properties of Al-Li alloys
摘要
Abstract
Due to the increasing stiffness requirements in the aerospace industry and the military,there has been a great interest in high lithium-containing aluminium alloys(>2%).Adequate optimization of the microstructure of aluminium-lithium alloys is of great value in improving the overall performance of high-lithium alloy plates for applications in the aerospace industry.In this paper,the effects of Li and Sc content on the microstructure and mechanical properties of aluminium-lithium alloys under different aging processes were investigated by analytical techniques such as metallurgical microscopy(OM),electron backscattering diffraction(EBSD),and transmission electron microscopy(TEM).The experimental results show that Sc can refine the grains and improve the hardness of Al-Li alloys.A large number of weaves exist in Al-Li alloys with different compositions,among which the Al-5%Li-0.1%Sc alloy has Brass{011}<211>weave,Cube{001}<100>weave and 30° ND Cube weave on{111}.In addition,Al3(Li,Sc)has a good co-lattice relationship with the matrix.It firmly pinches the dislocations,resulting in an increase in the dislocation density and thus an increase in the hardness of the alloy.关键词
铝锂合金/Sc/晶粒/Al3(Li,Sc)析出相/几何必需位错Key words
Al-Li alloy/Sc/crystal grains/Al3(Li,Sc)precipitated phase/geometrically necessary dislocations分类
金属材料引用本文复制引用
陈力,张嘉艺..Li+Sc含量对Al-Li合金组织和性能的影响[J].有色金属科学与工程,2025,16(5):734-745,12.基金项目
江西省科技创新国际科技合作项目(20212BDH81005) （20212BDH81005）
江西省教育厅青年人才资助项目(GJJ210881) （GJJ210881）
江西理工大学科研启动基金(205200100544) （205200100544）
