| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Probing the Deformation Mechanisms of Al-matrix Composites with Small-scale Mechanical Testing |
| Author(s) |
Olivia Donaldson, Jenna Wardini, Timothy Rupert |
| On-Site Speaker (Planned) |
Olivia Donaldson |
| Abstract Scope |
Metal matrix composites (MMCs) have emerged as important materials in the aerospace and automotive industries. These materials deform in interesting ways, due to a combination of hard and soft phases that are mixed together. To facilitate an understanding of the deformation mechanisms and the importance of interfaces inside the material, in situ mechanical testing in the scanning electron microscope is used here to elucidate deformation mechanisms from the nanoscale to the microscale. Micron-sized pillars of Al-5Zn-1.5Mg-0.4Mn-0.2Cu-0.2Zr reinforced with SiC particles were compressed to determine the interplay between the two main phases, followed by the isolation of individual internal interfaces. Analysis of the material following failure showed dispersed secondary phases, precipitates, intermetallics, and boundary enrichment. The Al-SiC interfaces were found to be particularly important, allowing us to develop new design rules for the incorporation of SiC particles within an Al-alloy matrix in order to limit slip band formation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |