中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 20 No. 11 November 2010 |
processed by cyclic extrusion and compression
（1. National Engineering Research Center for Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;
2. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
3. Department of Materials Science and Engineering,
Norwegian University of Science and Technology, Trondheim 7491, Norway）
Abstract:The microstructure and crystallographic texture characteristics of an extruded ZK60 Mg alloy subjected to cyclic extrusion and compression (CEC) up to 8 passes at 503 K were investigated. The local crystallographic texture, grain size and distribution, and grain boundary character distributions were analyzed using high-resolution electron backscatter diffraction (EBSD). The results indicate that the microstructure is refined significantly by the CEC processing and the distributions of grain size tend to be more uniform with increasing CEC pass number. The fraction of low angle grain boundaries (LAGBs) decreases after CEC deformation, and a high fraction of high angle grain boundaries (HAGBs) is revealed after 8 passes of CEC. Moreover, the initial fiber texture becomes random during CEC processing and develops a new texture.
Key words: ZK60 Mg alloy; cyclic extrusion and compression; electron back scatter diffraction (EBSD); microstructure; texture
