1420Al-Li合金冷轧板材的各向异性  

Anisotropy of 1420 Al-Li Alloy Cold-rolled Sheet

作　　者：钟利萍[1] 郑子樵[2] 李锡武[2] 吴迎学[1] 黄兰平[3] 

机构地区：[1]中南林学院工业学院,湖南长沙410004 [2]中南大学材料科学与工程学院,湖南长沙410083 [3]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《金属热处理》2005年第8期13-18,共6页Heat Treatment of Metals

基　　金：国家科技攻关计划项目(计国防95-YS-006)

摘　　要：通过热处理、拉伸性能测试、金相及电镜观察分析,研究了1420Al-Li合金冷轧薄板的各向异性。结果表明,该合金在力学性能及拉伸断裂特征方面均具有明显的各向异性。经过不同的热处理,合金的各向异性程度不同:固溶水冷样比空冷样的最大强度高,各向异性程度也较明显;空冷样σb各向异性程度随时效时间延长稍有增加。合金呈现明显的各向异性是由于其较高程度的轧制变形组织和时效析出相δ′等因素综合作用的结果。Anisotropy of 1420 A1-Li alloy cold-rolled sheet were studied by means of heat treatment, tensile test as well as OM and SEM observation. The result indicates that the alloy is obviously anisotropic in mechanical properties and tensile fracture. Anisotropy extents of the alloy through various heat treatment are different. The specimens after solid solution and quenched in water have higher strength and anisotropy extents than that of samples quenched in air when the aging time are the same;and the anisotropy extent of the specimens quenched in air will increase slightly with the aging time increasing. Anisotropy of 1420 A1-Li alloy is due to its highly deformed microstructure and precipitate δ′ as well as their interaction.

关 键 词：1420A1-Li合金 热处理 力学性能 各向异性 断裂行为 

分 类 号：TG146.2[一般工业技术—材料科学与工程]