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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 Heat-Resistant Cr-Alloys, Microstructure, Oxidation and Creep
Author(s) Uwe Glatzel, Mathias Galetz, Anke Silvia Ulrich
On-Site Speaker (Planned) Uwe Glatzel
Abstract Scope A two phase alloy of Cr, bcc, solid solution matrix strengthened by a Cr3Si, A15 ordered, intermetallic phase was investigated with the goal of achieving an alloy with properties "Beyond Nickel-Based Superalloys". These Cr-Si alloys may enable higher working temperatures and lower densities. In addition, Cr is the only refractory metal which intrinsically builds an oxide scale suitable for protecting the alloy from oxidation. Si improves the oxide scale formation even further as well as a high temperature strength by precipitation of an intermetallic phase Cr3Si. We observed that the addition of further alloying elements such as Mo, Ge, and Pt leads to an improvement in creep properties (Mo), oxidation resistance (Ge), and nitridation resistance (Pt) by maintaining the two-phase microstructure. Creep tests were conducted at 980C and higher and reveal promising results. The microstructures, scales, and reaction products were investigated by XRD, SEM, EPMA and image analysis.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Mechanical Properties, Other


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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