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
李卫华, 李 扬, 蔡 彬
点击：3489次 下载：0次
作者单位：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
中文关键字：Al-Sc-Zr合金； 晶粒尺寸； 时效； 拉伸性质
英文关键字：Al-Sc-Zr alloys; grain size; sging; tensile properties
中文摘要：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%。
关键词：Al-Sc-Zr合金； 晶粒尺寸； 时效； 拉伸性质
英文摘要：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 Al-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%.