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Meeting TMS Specialty Congress 2026
Symposium 4th World Congress on High Entropy Alloys (HEA 2026)
Presentation Title Lowering the Minimum Threshold of Aluminum for Protective Oxide in FeCrAl Alloys via the Third Element Effect
Author(s) Catherine Lynch
On-Site Speaker (Planned) Catherine Lynch
Abstract Scope The third-element effect describes the phenomenon in which an intermediate oxide former is added to a binary system to promote the formation of a protective oxide below the classical threshold of the primary oxide former. This effect is relevant to HEA design because the interrelations between elements affect the concentration required to yield the desired oxidation resistance. In this study, the role of chromium as an alumina-forming aid was explored in FeCrAl alloys with 10 at% Cr and 0-16 at% Al. Thermogravimetric analysis was performed at 800°C and 1000°C in 1 atm of oxygen for 24 hours to investigate alloy oxidation with increasing volatility of Cr2O3. The oxides were characterized via XRD and EDS. Chromium oxides were not found in the oxide scales at either temperature, ruling out a chromia scaffold as the predominant mechanism. Alternative mechanisms are explored in this study.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A High-Throughput Framework for HEA Design & Applications to Metalloid-Containing Systems
A Novel Phenomenological Approach for Predicting the Transport Properties of Transition-Metal High Entropy Alloys at Elevated Temperatures
A Pinch of Oxygen: A Game Changer for Microstructure and Strength in Refractory High-Entropy Alloys
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Accelerated R&D With Autonomous Experimentation & Self-Driving Labs
Accelerating HEAs Development Through the Alloy Optimization Software
Achieving Combined High Temperature Strength and Tensile Ductility in Refractory Compositionally Complex Alloys
Additive Manufacturing Meets High-Entropy Alloys: Printability Maps, Microstructure Control, and Design Opportunities
Advancing HEA Design: Database Expansion and Integrated Modelling
An Efficient Framework for Predicting Order in Multicomponent Systems
An Innovative Radial Gradient Design of a Copper-Based High Entropy Alloy (Cu-HEA)/Chromium (Cr) Bi-Metallic Structure Fabricated Using Powder-Metallurgy Hot Isostatic Pressing for Extreme Environment Applications
Bayesian Blacksmithing: Discovering Thermomechanical Properties and Deformation Mechanisms in High-Entropy Refractory Alloys
CALPHAD-Guided Design of Ru-B2 Strengthened Nb-Based Refractory Alloys
Chemical Short-Range Order in High-Entropy Alloys: Detection, Thermodynamics and Kinetic Nature and Property Control
Chemical Synthesis of HEA Powders from Metal Oxides for Catalyst Applications
Chemical Synthesis of High Entropy Alloy Nanopowders for Catalyst Applications
Competing Entropy Versus Enthalpy Driven Stabilization of Ordered Phases in a Al0.3CoFeNi High Entropy Alloy Leading to Excellent Tensile Properties
Compositionally Complex Alloy Nanoparticles via Nanosecond Laser-Induced Dewetting
Corrosion and Passivation of Multi-Principal Element Alloys in AqueousSolutions
Data-Driven Insights Into Magnetocaloric Behavior in High-Entropy Alloys
Deformation and Failure of TiZrNbHfTa Refractory High-Entropy Alloys
Deformation Behaviour of GRX-810 at Extreme Temperatures
Design and Development of Lightweight Medium- and High-Entropy FeMnAlC Steels
Design of NiTi-Based High Entropy Shape Memory Alloys Based on Transformation Temperature Predictions
Design Opportunities for Additive Manufacturing of Compositionally Complex Refractory Alloys
Design Strategy of High-Entropy Alloys by Subtituting Cobalt Towards High Hardness and Low Wear Rate using X-Cr-Fe-Mn-Ni System
Designing High-Entropy and Compositionally Complex Alloys from (Al-Mn)-(Co-Fe-Ni) Pseudo-Binary Systems to Stabilize the Tau Phase in Al-Mn-Based Ferromagnetic Alloys
Designing Oxidation-Resistant AlVCrZrNbx Lightweight Refractory HEAs Through Nb Variable via Powder Metallurgy
Design, Synthesis, and Properties of WTaCrVHf High Entropy Alloys
Development and Characterization of a New Multicomponent Alloy Based on 30Ti-30Nb-5Fe-30Mn-5Al (at%) for Biomedical Applications
Development of High Specific Modulus Multicomponent Alloys with an FCC Structure
Development of NiCoFeCrAl Based High Entropy Alloys for Hydrogen Fueled Turbine System
Development of Processing Maps for Medium Entropy Alloy GRX-810 by HVOF
Direct Observation of Principal Elements and Local Ordering on HEA Surfaces
Discovery of High-Strength, High-Plasticity, and Oxidation-Resistant RHEAs Through Data-Driven Modeling
Effect of Al Content on the Microstructure and Mechanical Behaviour of (CrFeNiCu)100-xAlx (x = 0 – 15 at.%) High Entropy Alloys
Effect of Mechanical Alloying on the Mechanical and Thermal Properties of FeCoCuNbMo High-Entropy Alloy
Effect of Si Addition on Microstructure and Tensile Properties of Cast CrFeCoNi Alloys
Effect of V2O5 Addition on the Reduction Processing of Equimolar CoFeNiMn Alloys Using Dilute Hydrogen
Effects of Entropy Stabilization and Phase Evolution on Hydrogen Storage Activation in TiFeCoNiCu High-Entropy Alloys
Effects of Precipitate-Forming Species and Grain Refinement on the Microstructural Evolution in Neutron-Irradiated CrFeMnNi and CrFeMnNiTiAl Compositionally Complex Alloys
Efficient Design of Quinary Alumina-Forming Refractory Multi-Principal Element Alloys
Element-Specific Magnetic Behavior in FeCrMnCoNi, CrCoNi and MnCoNi Multi Principal Element Alloy Thin Films
Element Substitution Effects on the Bi Site in RE(O, F)BiS2 with High-Entropy-Alloy Type RE Site
Fast‑Track Microstructure Design in HEAs Using Pseudo‑Binary Diffusion Couples
HEAs with Exceptional Combination of Strength and Ductility
High-Entropy Alloys: Optimizing Processing Parameters and Establishing Composition-Property Relationships for Advanced Turbine Aeroengine Applications
High-Entropy Oxide Catalysts for the Reductive Depolymerization of Organosolv Iignin
High-Temperature Microstructural Stabilization and Oxidation Behavior of Al–Mg Alloys Modified with Zr, Er, and Yb
High-Throughput Assessment of Equilibrium Phases in Al–Ti–Nb–Mo–V/Cr Systems
High-Throughput Design and Experimental Validation of Low-Modulus BCC High-Entropy Alloys for Next-Generation Biomedical Implants
High Entropy Laves Phase Ductile and Highly Deformable
High Temperature Oxidation of AlCrFeNiTiₓ High Entropy Alloys
Improved Oxidation Resistance of NbTiZr under Thermal Cyclic Conditions
In-Situ Spatiotemporal Characteristics of Deformation: From Microstructurally Simple Metals to Complex Concentrated Alloys
Influence of Chemical Short-Range Order on Stacking Fault Energy and Deformation in a CoCrNi-based Alloy
Influence of Ti on the Mechanical Properties and Strengthening Mechanisms of In-Situ Alloyed CoCrNi Processed via Laser Powder Bed Fusion
Investigation of the Mechanical Response and Work Hardening Characteristics of High-Magnesium ECO-Almag Alloys Processed by Cold Forging
Irradiation Resistance of High-Entropy Alloys for Accelerator Beam Window Applications
Learning Alloying Strategies from Small Datasets and Cheap Parameters to Increase Room Temperature Ductility of Tungsten-Based Refractory High Entropy Alloys
Linking Chemical Short-Range Order to Defect Dynamics in High-Entropy Ceramics
Lowering the Minimum Threshold of Aluminum for Protective Oxide in FeCrAl Alloys via the Third Element Effect
Machine Learning-Driven Discovery of Oxidation-Resistant, High-Strength Refractory High Entropy Alloys
Machine Learning–Driven Optimization of AlCrFeCoNi High-Entropy Alloys for High-Temperature Thermal and Mechanical Performance
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Manufacturability-Driven Discovery of Quinary High-Entropy Alloys From Conventional Alloy Systems
Mechanistic Insights Into Corrosion of Ultrafine- and Coarse-Grained HEAs: Roles of Grain Size and Passive Film Evolution
Mitigating Grain Coarsening in Nanocrystalline AlCoCrCuFeNi High Entropy Alloys Through Minor Solute Doping
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Multiple Deformation Mechanisms in a 3D-Printed CrMnFeCoNi High-Entropy Alloy
Neutron Diffraction as a Technique for Detecting Chemical Short-Range Order in CrCoNi Alloy
On the Nature of Chemical Short-Range Order Evolution
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Refractory High-Entropy Alloys for Fusion Reactor Plasma-Facing Components Under Extreme Heat Flux
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Revealing the Impact of the Chemical Short-Range Order on Hydrogen Embrittlement of the Equiatomic CoCrNi Medium-Entropy Alloy
Role of Short-Range Order and Strain Rate on Dislocation-Mediated Plasticity in CrCoNi Medium-Entropy Alloys
Solid State Reduction Synthesis of Refractory High Entropy Alloy CrTaVW: Reduction Mechanism and Microstructural Development
Solidification Modeling and Validation for Novel Refractory Multi-Principal Element Alloys Produced in Additive Manufacturing Conditions
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Surface Reactions in Refractory Multi-Principal Element Alloys
Sustainable Synthesis of Compositionally Complex Alloys via Melt-Driven Mechanochemical Reduction
Swift Heavy-Ion Irradiation in Sr-Based High-Entropy Perovskites
Synchrotron-Based X-Ray Absorption and X-Ray Magnetic Circular Dichroism Spectroscopic Studies of Temperature-Dependent Magnetism in (CoCuFeNiTi)3O4 High Entropy Spinel Oxide
The Negative Correlation Between Twinning Stress and Stacking Fault Energy in Single Crystals of CrCoNi Alloys
Thickness-Dependent High-Entropy-Alloy Nanoparticle Formation via Pulsed Laser-Induced Dewetting
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