About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Phase Stability and Nanomechanical Behavior of Laser Direct Metal Deposited Concentrated Fe-Cu Alloys |
Author(s) |
Amit Misra |
On-Site Speaker (Planned) |
Amit Misra |
Abstract Scope |
Non-equilibrium solute partitioning in laser additive manufactured concentrated binary alloys is shown to produce hierarchical multi-phase microstructures with feature sizes ranging from nanometer to micrometer length scales. Experimental and modeling results from concentrated Fe-Cu binary alloys, with 25-50 atomic% Cu, fabricated using laser direct metal deposition are analyzed. Cu phase exhibited nanoscale, coherent, metastable FCC Fe precipitates, while the Fe phase either had both nanoscale, coherent, metastable BCC Cu and semi-coherent FCC Cu precipitates or just the latter, depending on composition and processing history. The hierarchy of nanoscale precipitation is shown to produce synergistic mechanisms that simultaneously enhance flow strength and strain hardening. Phase stability of the nanoscale precipitates was evaluated using high-pressure diamond anvil cell experiments that revealed nanoscale phase transitions in both Cu and Fe precipitates. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Phase Transformations |