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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 Strong Effects of Tiny Compositional Changes on Structural and Functional Material Properties
Author(s) Gunther F. Eggeler
On-Site Speaker (Planned) Gunther F. Eggeler
Abstract Scope In materials technology it is not uncommon to come across cases, where tiny compositional changes strongly affect structural and functional properties. A few examples from different fields are presented. Thus, it is shown how segregation of S/Sb to grain boundaries in Fe/Cu-based alloys promotes the formation of creep cavities. The segregation of alloy elements to planar faults in ordered intermetallic systems is discussed. It is then shown how small variations in Ni-concentration in a NiTi shape memory alloy affect phase transition temperatures and how the uptake of small quantities of C and O during ingot metallurgy of NiTi shape memory alloys affects phase transformation temperatures and structural fatigue lives. And finally, a case study is presented which shows how the creep behavior of a Re-free Ni-base single crystal superalloy changes when its low W content is reduced by a factor of 2. Implications for alloy design are discussed.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Phase Transformations, Solidification


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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