| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Deformation Enabled Precipitation in Magnesium Alloys during Hot Compression |
| Author(s) |
Suhas Eswarappa Prameela, Yannick Hollenweger, Peng Yi, Steven Lavenstein, Roshan Plamthottam, Alec Davis, Joey Chen, Joseph Robson, Jaafar El-Awady, Michael Falk, Dennis Kochmann, Timothy Weihs |
| On-Site Speaker (Planned) |
Suhas Eswarappa Prameela |
| Abstract Scope |
Simple aging of Magnesium alloys often yields inadequate precipitation hardening response compared to Aluminum alloys. Deformation-enabled precipitation is one viable strategy to overcome this problem. Using defects, one can severely alter the nucleation and growth of desired second phases and thereby tune their number density, size, shape, orientation, and spatial distribution. Through simple compression experiments on rolled, large-grained Magnesium-Aluminum alloys, we show how solid-solid phase transformations are altered in grain interiors and along grain boundaries after only 10% plastic strain and at four, relatively low temperatures (25C, 100C, 150C, and 200C). With ex situ TEM, we detail the nanoscale Mg17Al12 intermetallic precipitates that form within a fully solutionized Mg-9Al matrix after compression. With crystal plasticity simulations, we link the inhomogeneity of these nano precipitates to the heterogeneity of deformation gradients within the samples. Finally, we explore the underlying mechanisms behind this deformation-induced precipitation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Phase Transformations, Mechanical Properties |