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

作　　者：丁桦[1] 赵文娟[1] 陈荣石[2] 任玉平[2] 郝士明[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《机械工程材料》2006年第12期36-39,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金(59971015)

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。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.

关 键 词：纯铝 等径角挤压 铸态 轧制态 

分 类 号：TG146.2[一般工业技术—材料科学与工程]