Zr含量对Al-0.2wt%Sc合金晶粒尺寸分布和室温拉伸性能的影响  

Effects of Zr Content on Grain size Distributions and Room Temperature Tensile Properties of Al-0.2wt% Alloys

作　　者：李卫华[1] 李扬[1] 蔡彬[1] 

机构地区：[1]郑州大学物理工程学院,教育部材料物理重点实验室,河南郑州450052

出　　处：《热加工工艺》2009年第22期25-28,共4页Hot Working Technology

基　　金：中国教育部留学回国科研启动资金资助项目

摘　　要：研究了锆含量对Al-0.2wt%Sc合金的晶粒尺寸分布和拉伸性能的影响。发现Zr不仅能细化合金的晶粒尺寸,而且对晶粒尺寸分布有显著影响。不同温度时效后的室温拉伸性能表明:合金的最佳时效强化温区为330～380℃,而且Zr的添加能适当提高合金的热稳定性。综合结果表明:锆的最佳含量应在0.04wt%～0.08wt%。The effects of Zr content on the grain size distribution and room temperature tensile properties of Al-0.2wt%Sc alloys were investigated. It is found that the Zr addition can obviously refine the grain size; furthermore, it has apparent effects on the grain size distribution of as-cast alloys. The tensile tests of AI-Sc-Zr alloys aged at different temperature show that the optimal aging-strengthening temperature region is between 330℃ and 380 ℃. In addition, Zr addition can slightly improve the thermal stability of Al-0.2%Sc alloys. The results indicate that the optimum content of Zr should be between 0.04wt% and 0.08wt%.

关 键 词：Al-Sc-Zr合金 晶粒尺寸 时效 拉伸性质 

分 类 号：TG146.21[一般工业技术—材料科学与工程]