| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Alloy Developments and Microstructural Mechanisms of Improved Plasticity in a Cr-based Nanocrystalline Alloy |
| Author(s) |
Bryan Lim, Christopher Fancher, Marissa Brennan, Steve Buresh, Chris Mclasky, Brian Gordon, Michael Spencer, Peeyush Nandwana |
| On-Site Speaker (Planned) |
Bryan Lim |
| Abstract Scope |
Initial studies show potential for elevated compressive strength and hardness from bulk alloys produced from their nanocrystalline (NC) counterparts. However, the widespread adoption of bulk NC alloys is severely impacted by scale-limited and cost prohibitive severe plastic deformation methods. This is accompanied by inevitable thermal instabilities such as room temperature (RT) grain coarsening. Here, a thermally stable NC Cr-based powder was produced through a proprietary powder manufacturing process based on nanophase separation sintering; resulting in a NC Cr matrix supersaturated with phase separating solutes. Bulk consolidation was achieved via extrusion and upsetting. The bulk alloy presents exceptional compressive strength and plasticity, both at RT and high temperatures (HT, 760 °C); whilst also achieving HT tensile ductility. We present preliminary results on the hierarchical microstructural phenomenology and phase stability owing to these bulk properties, evaluated via multiscale electron microscopy and XRD methods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Powder Materials, Mechanical Properties |