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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,


Ambient-temperature Plasticity of Brittle Intermetallics at Micron-meter Size Scales
Challenges in the Design of Refractory Multi-principal Element Alloys
Deformation Mechanisms in Compositionally Complex Polycrystalline CoNiCr-based Superalloys
Deformation Twinning in HCP Ti: The Role of Interfacial Complexions and Interstitial Solutes
Easo George – Advancing Understanding of Mechanical Behavior through Test Material Preparation
Easo George - Recollections of His Youth
Factors Affecting Mechanical Twinning in Single-phase FCC and Polycrystalline MEAs and HEAs
Fracture Properties of High-entropy Alloys
From Superplasticity in Steels to the Great Pyramid of Giza
Functional High Entropy Alloys
Future Prospects of MoSiBTiC Alloys as Ultra-High Temperature Materials
Heat-Resistant Cr-Alloys, Microstructure, Oxidation and Creep
Low Temperature Deformation Mechanisms of CrMnFeCoNi High-entropy Alloy Polycrystals
Physical Metallurgy and Mechanical Properties of Iridium and Platinum Alloys Used in Power and Heat Sources Onboard Interplanetary Spacecraft
Predicting High Entropy Alloy Phase Stability across Length Scales
Solid Solution Hardening Effects on Thermal Stability and Mechanical Properties of Nanostructured Ni-enriched CrMnFeCoNi High Entropy Alloys
Some Unusual Aspects of the Deformation Behavior of FeAl
Strong Effects of Tiny Compositional Changes on Structural and Functional Material Properties
The Interplay between Phase Transformation and Mechanical Properties in High Entropy Alloys
Theory-guided Design of High-strength, Ductile, Single-phase BCC High Entropy Alloys
Utilizing Nanoprecipitates to Modulate Phase Transformation, Strength, and Ductility of HEAs

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