| About this Abstract |
| Meeting |
Materials Science & Technology 2010
|
| Symposium
|
High Strain Rate Behaviors of Composites and Heterogeneous Materials: Experiments, Modeling, and Simulation
|
| Presentation Title |
Effect of Successive Hot Rolling on the Microstructure and High Strain Rate Behavior of Al(A359)/SiCp Composites Prepared by Stir Casting |
| Author(s) |
Catalina Uribe, Bo Yao, Michael D. Skibo, Allen J. Drake, David M. Schuster, Adam Loukus, Kyu Cho, Yongho Sohn |
| On-Site Speaker (Planned) |
Catalina Uribe |
| Abstract Scope |
Discontinuously reinforced metallic matrix composites with optimized microstructure are sought after for exceptional high strain rate behavior. The microstructure evolution of a stir-cast A359 aluminum composite reinforced with 30 vol.% SiC during successive hot-rolling process has been investigated. Quantitative microstructural analysis was carried out for the as-cast and successive rolled specimens (64, 75, 88, and 96% rolling reductions) by using X-ray diffraction, optical, scanning and transmission electron microscopy. The hot rolling considerably decreased the SiC particles size (down to about 20% after 96% reduction) by breaking-up while increasing the homogeneity of SiC size distribution. Voids due to solidification shrinkage, incomplete infiltration of molten Al and between the fractured particles were observed to close with the successive rolling. Quantified microstructural features are presented and correlated to dynamic compressive strength of the composite. |
| Proceedings Inclusion? |
Definite: A CD-only volume |