| 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 |
Targeted Processing of Nanocrystalline Alloys to Elicit Nonequilibrium Interfacial States |
| Author(s) |
Glenn Balbus, Zhitong Bai, McLean Echlin, Tresa Pollock, Yue Fan, Daniel Gianola |
| On-Site Speaker (Planned) |
Daniel Gianola |
| Abstract Scope |
The nonequilibrium nature of amorphous solids such as metallic glasses shares intriguing commonalities with grain boundaries in nanocrystalline materials, owing largely to the multiplicity of energy states inherent to disorder. Here, we report on studies of nanocrystalline materials and novel synthesis and processing routes for controlling the structural state – and as a consequence, the mechanical properties. We study relaxation processes at grain boundaries in nanocrystalline materials that facilitate atomic reconfigurations toward a lower energy state such as low temperature annealing, which enhance mechanical strength while promoting shear localization. A particular focus in this talk will be on strategies for rejuvenation at grain boundaries with the goal of suppressing shear localization and endowing damage tolerance. Parallels between our results and rejuvenation processes in glasses, as well as the interplay between grain boundary structure and chemistry through segregation engineering, will be discussed in the context of controlling metastable structural configurations. |
| Proceedings Inclusion? |
Undecided |