| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
|
| Presentation Title |
Nanomechanical Testing of Spark Plasma Sintered Stainless Steel Parts |
| Author(s) |
Alexander David Preston, Kaka Ma |
| On-Site Speaker (Planned) |
Alexander David Preston |
| Abstract Scope |
Gas atomization and cryomilling provide powder materials with microstructure far from equilibrium because of the rapid solidification rate and severe plastic deformation, respectively. The conventional way of producing bulk materials from powders involve long-time exposure to high temperatures, leading to coarsening of the microstructure and near-equilibrium state. Spark plasma sintering can retain the fine grain structure of the feedstock powder and non-equilibrium state via high heating rates. To elucidate the nature of the interaction between electric current with powder particles in SPS, the present work investigated the microstructure and mechanical properties of nominally austenitic stainless steel samples fabricated via SPS of gas atomized powder and cryomilled powder. Nanoindentation and nanoscratch testing at both ambient and elevated temperature were performed to reveal the changes of hardness, wear resistance, and plastic deformation in necks and inter-particle region during SPS compared to those of the center regions in the prior particles. |
| Proceedings Inclusion? |
Undecided |