铸态与轧制态纯铝等径角挤压变形后的组织与性能
Microstructure and Mechanical Properties of Cast and Rolled Pure Al Deformed by Equal Channel Angular Pressing
摘 要
对铸态及轧制态的纯铝进行了等径角挤压(ECAP) 变形,用透射电镜观察了变形后的显微组织,并对不同道次变形后的材料进行了硬度测定.结果表明:ECAP方法可使纯铝组织获得显著细化,在相同的变形条件下,铸态与轧制态纯铝均获得了等轴细晶组织,且晶粒尺寸相差不大.1道次ECAP变形后材料的硬度明显增大,随后每道次硬度的增大趋势明显变缓.这说明初始状态对ECAP变形后的组织和性能影响不大.
等径角挤压
铸态
轧制态
pure Al
equal channel angular pressing
cast
roll
Abstract
Cast and rolled Al were deformed by equal channel angular pressing (ECAP).Microstructure before and after ECAP were observed and hardness of the materials were measured.The grains in the materials could be remarkably refined by ECAP and there is no obvious difference between the deformed microstructure of specimens which had different initial states.The Vickers hardness of the materials increased after 1st pass during ECAP process and the increasing trend become slower in the following passes.The initial states have no obvious impact on the microstructure and mechanical properties of the materials during ECAP process.
中图分类号 TG146.2
所属栏目
基金项目 国家自然科学基金资助项目(59971015)
收稿日期 2006/1/19
修改稿日期 2006/4/21
网络出版日期
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备注丁桦(1958-),女,安徽合肥人,教授,博士生导师.
引用该论文: DING Hua,ZHAO Wen-juan,CHEN Rong-shi,REN Yu-ping,HAO Shi-ming. Microstructure and Mechanical Properties of Cast and Rolled Pure Al Deformed by Equal Channel Angular Pressing[J]. Materials for mechancial engineering, 2006, 30(12): 36～39
丁桦,赵文娟,陈荣石,任玉平,郝士明. 铸态与轧制态纯铝等径角挤压变形后的组织与性能[J]. 机械工程材料, 2006, 30(12): 36～39
被引情况:
【1】刘国心,魏伟,魏坤霞, "等通道变形高纯铝的显微组织与力学性能",机械工程材料 32, 66-69(2008)
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【10】Gourdet S,Montheillet F.An experimental study of the recrystallization mechanism during hot deformation of aluminum[J].Mater Sci Eng,2000,A283:274-288.
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