Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1636607 | Transactions of Nonferrous Metals Society of China | 2013 | 8 Pages |
Abstract
An aluminum-based in-situ composites reinforced with Mg2Si and Si particles were produced by centrifugal casting Al-20Si-5Mg alloy. The microstructure of the composites was examined, and the effects of temperature on fracture behavior of the composite were investigated. The results show that the average fraction of primary Si and Mg2Si particles in the composites is as high as 38%, and ultimate tensile strengths (UTS) of the composites first increase then decrease with the increase of test temperature. Microstructures of broken specimens show that both the particle fracture and the interface debonding affect the fracture behavior of the composites, and the interface debonding becomes the dominant fracture mechanism with increasing test temperature. Comparative results indicate that rich particles in the composites and excellent interface strength play great roles in enhancing tensile property by preventing the movement of dislocations.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bo LI, Kai WANG, Ming-xiang LIU, Han-song XUE, Zi-zong ZHU, Chang-ming LIU,