| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloy Behavior and Design Across Length-Scales: An SMD Symposium Honoring Easo George
|
| Presentation Title |
Easo George – Advancing Understanding of Mechanical Behavior through Test Material Preparation
|
| Author(s) |
William D. Nix |
| On-Site Speaker (Planned) |
William D. Nix |
| Abstract Scope |
Easo George has advanced the understanding of mechanical behavior of metals through his meticulous care in preparing materials of purity and perfection for subsequent mechanical testing. After Uchic developed his micropillar compression technique for studying mechanical behavior in small dimensions, we and others thought that the strong size effects being observed could be caused by a dislocation starvation effect. A debate about the remarkable size effect ensued for several years until George reported on his development of a technique to create highly perfect micropillars of Mo by directionally solidifying NiAl-Mo eutectic alloys and etching the NiAl matrix to expose highly perfect Mo pillars for micro-compression testing. With this ingenious approach George showed how dislocation-free pillars exhibited ideal strengths and that pre-straining to introduce dislocations caused weakening. George’s work essentially closed the book on understanding the role of dislocation content on the strength and plasticity of crystals in small volumes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, |