Microstructure evolution of Al-15% Si alloy during hot rolling |
| |
| Authors: | Chunxia Wang Dazhi Zhao Xiang Zhao Liang Zuo |
| |
| Institution: | 1. School of Materials Science and Engineering, Northeastern University, Shenyang, People’s Republic of China;2. College of Materials Science and Engineering, Guilin University of Technology, Guilin, People’s Republic of Chinawangcx@glut.edu.cn |
| |
| Abstract: | ABSTRACTA direct chill (DC) cast Al-15% Si alloy was processed by hot rolling with a single pass at a temperature of 520°C with a thickness reduction of 80%. Scanning electron microscopy (SEM), electron backscattering diffraction (EBSD) and transmission electron microscopy (TEM) were used to investigate the evolution of the sample’s microstructure. After hot rolling, silicon particles homogeneously distributed in the Al matrix with fine equiaxed grains of average size ～ 0.95?μm. High-angle boundaries (HABs) (about ～75.8% in percentage) dominate in the Al matrix structure. There is evidence for Si-particle-stimulated continuous dynamic recrystallization (CDRX) during hot rolling. |
| |
| Keywords: | Al–Si alloy hot rolling microstructure Si particles dynamic recrystallization |
|
|
