| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7980257 | Materials Science and Engineering: A | 2014 | 8 Pages |
Abstract
The microstructure stability and micro-hardness of as-extruded bimodal size (micron+submicron) SiCp/AZ91 composites were investigated. Results show that the significant grain refinement appears around micron SiCp at the temperature range of 643-693Â K. Compared with monolithic AZ91 alloy and micron SiCp/AZ91 composite, the obvious submicron particle dense zones (SPDZs) are formed in the vicinity of micron SiCp in bimodal size SiCp/AZ91 composite during thermal stability test, which results in the small average grain size and improved microstructure stability. The micro-hardness of bimodal size SiCp/AZ91 composite is higher than that of monolithic AZ91 alloy and micron SiCp/AZ91 composite. The micro-hardness of bimodal size SiCp/AZ91 composite depends strongly on grain size and the lowest micro-hardness appears at 643Â K.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jian-chao Li, Kai-bo Nie, Kun-kun Deng, Shuan-jun Shang, Shan-shan Zhou, Fang-jun Xu, Jian-feng Fan,