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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
Presentation Title Microstructure and Mechanical Properties of New Compositionally-Complex Fe-Cr-Mn-Al Ferritic Stainless Steels Free of σ-Phase, χ-Phase and 475 °C Embrittlement
Author(s) Kevin J. Laws, Stephanie Blankley, Douglas Raigosa, Natalie Krieger, Jackson Baker, Joel Luke Abraham, Kaitlyn Paulsen, Alexandra Loumidis , Fadlin Natsition, Karen Privat, Patrick Lars Joseph Conway, Lori Bassman
On-Site Speaker (Planned) Kevin J. Laws
Abstract Scope A series of new compositionally-complex Fe-Cr-Mn-Al disordered BCC alloys, (ferritic stainless steels), have been developed. The microstructural evolution and associated mechanical properties of these alloys with regard to formation of the σ-phase, χ-phase and αFeCr' phase separation may be tailored over a broad, Fe-based composition range. In combination with Mn, the addition of Al reduces or eliminates the formation of both the σ- and χ-phases. The progressive addition of Mn-content from 5-25 at.% contracts the αFeCr' immiscibility gap, opening a broader, stable αFe solid solution composition range at higher Cr-contents. Mechanically, alloys found within the extended multicomponent αFe phase field or in proximity to the αFeCr' transition boundary exhibit 25-35% tensile elongation and ductile, transgranular failure. Both the yield and ultimate tensile strengths of these alloys are generally higher than existing austenitic and ferritic stainless steels, ranging 370-530MPa and 460-600MPa respectively.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Mechanical Properties, Iron and Steel

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

100+ Fold Acceleration in Multi-Objective Alloy Development: Application of the BIRDSHOT Framework to the Efficient Exploration of FCC HEA Alloy Spaces
A Molecular Dynamics Multi-Particle Model for Modeling Hot-Press Sintering Process of HEAs Combined with Phase-Field Simulation
Achieving High Strength and Ductility in Single-Phase Refractory Multi-Principle-Element Alloys via DFT-Guided Tailoring of Chemical Short-Range Order
Additive Manufacturing of Emerging Complex Alloys
Alloy Design, Microstructure, and Mechanical Properties of CoFeNi Medium Entropy Alloy with Vanadium and Carbon Addition
Bidirectional Transformation in a Low Energy Interface Engineered Metastable High Entropy Alloy Under Dynamic Loading
Characteristic Dislocation Slips in Polycrystalline HfNbTiZr Equi-Atomic Alloy
Cluster-Model-Based Composition Design Method for High-Entropy Alloys
CMT-Associated Superior Mechanical Properties in Multi-Principal Element Alloys
Competition Between Faulting Plasticity and Transformation-Induced Plasticity at Cryogenic Temperatures
Composition Design of Refractory High-Entropy Alloys with Machine Learning Models
Compositional Effect on Microstructure and Deformation Behavior of Metastable Refractory High-Entropy Alloys
Computational Design of Cost-Effective High-Entropy Thermal/Environmental Barrier Coatings
Controllable Structure and Superior Mechanical Properties of Metallic Glasses through Atomic Manufacturing
Damage Tolerance in bcc vs. fcc High-Entropy Alloys
Deciphering the Operative Micromechanisms Affecting the Strain Rate Sensitivity in (FeCrNi)99Si1 Medium Entropy Alloy
Deformation Induced Transformation in Metastability Engineered Alloys
Design of High Performance Fe-Based Superalloys for Elevated Temperature Applications
Design of L12 Precipitation-Strengthened Face-Centered-Cubic High-Entropy Alloys
Development of Ductile Refractory High Entropy Alloys with High Strength via Controlling Cold-Rolling and Annealing Process
Direct Ink Writing and Sintering of Micro-Lattices with Multi-Principal Element Alloys with High Specific Mechanical Properties
Disordered Enthalpy-Entropy Descriptor for High-Entropy Ceramics Discovery
Ductile and Plastic HfTaTiNbZr Refractory High Entropy Alloys Studied with In Situ Neutron Diffraction
E-10: Harnessing Defects for Enhanced Strength in Medium Entropy Alloys
E-11: Heterogeneous Failure Mechanisms in an Eutectic High Entropy Alloy Under High Strain-Rate Loading
E-12: High-Density Nanoprecipitates and Phase Reversion via Maraging Enable Ultrastrong Yet Strain-Hardenable Medium-Entropy Alloy
E-13: In-Situ Compression of Al5Co35CrFe20Ni5 Alloy Studied Using Synchrotron Radiation
E-14: In-Situ Deformation Study of Non-Shearable Nanodispersion Strengthened Refractory Complex Concentrated Alloys
E-15: Investigation of Elastic and Plastic Deformation Behavior of Nature Selected Refractory High Entropy Alloy
E-16: Low Cycle Fatigue of a Medium Entropy Alloy with Short-Range Ordering
E-17: Mechanical Behavior of 16 Refractory High Entropy Alloys Under Compressive and Tensile Stress: A Molecular Dynamics Study
E-18: Microstructural Evolution and Mechanical Behavior of HfTiZrNbx Refractory High-Entropy Alloys Under Different Annealing Conditions
E-19: Microstructure and Mechanical Properties of In-Situ TiC Reinforced TaNbVTi High Entropy Alloy Matrix Composites
E-1: A Machine Learning Approach for the Prediction of Formability and Thermodynamic Stability of Refractory Compositionally Complex Alloy Containing Mo and W
E-20: Modeling Dense Alloys in Discrete Dislocation Dynamics
E-21: Overcoming Strength-Ductility Trade-Off Through Periodic Spinodal Decomposition in Ferrous Medium-Entropy Alloy
E-22: Oxidation Behavior of Low-Density Non-Equiatomic AlCuFeNiTi High Entropy Alloy
E-23: Refractoriness, Thermal Expansion Behavior and Microstructure Stability at 1200°C of an Equimolar Cast CoNiFeCr Alloy and Its Versions with Addition of Titanium or of Tantalum
E-24: Revealing the Deformation Mechanism Competition in Multi-Principal Element Alloys by Nanobending Experiments
E-25: Significant Improvement of Strain Hardening Through Massive Coherent Boundaries in Nano-Lamellar Structured Complex-Concentrated Alloys
E-26: Stretch Formability and Cryogenic Environmental Applicability of Fex(CoNi)90-xCr10 Ferrous Medium-Entropy Alloys
E-27: The Rule of Mixtures, A New Evans-Polanyi-Semenov Relation, and Twinning Predictions for High Entropy Transition Metal Ceramics
E-28: Tribological Stress Field Model Validation by Using Deformation Twins as Probes
E-29: Unveiling Yield Strength of High Entropy Alloys Using Physics-Enhanced Machine Learning Under Diverse Experimental Conditions
E-2: As-Cast Microstructure, Hardness and High Temperature Creep Behavior of an Equimolar CoNiFeCr Alloy; Effects of a Ti or Ta Addition
E-30: Welding-Driven Compositional Heterogeneity Enhances Cryogenic Mechanical Properties in Metastable Ferrous Medium-Entropy Alloy Welds
E-3: Development of γ'-Strengthened Medium-Entropy Alloys with Mitigated Mechanical Instability at Extremely Low Temperatures
E-46: In situ Neutron Diffraction Study on L12-Precipitation-Strengthened (FeCoNi)86Al7Ti7 High Entropy Alloy
E-47: High and Moderate Temperature Deformation Modeling of High Entropy Alloys
E-4: Effect of Microstructure on Hot Deformation and Dynamic Recrystallization Behavior of WMoFeNi MPEA Alloy Regulating Alloy Composition
E-52: Effect of Ti Addition on Strengthening and Deformation Mechanism of Ni-Rich High Entropy Alloy Synthesized via Spark Plasma Sintering: An Experimental and Atomistic Approach
E-5: Effect of Processing Route on the Morphology of Fe-Rich Phase and Concurrent Mechanical Response in Cu-Rich Compositionally Complex Alloy
E-6: Effects of Molybdenum and Silicon Co-doping on Microstructures and Mechanical Properties of CoCrNi Medium Entropy Alloy
E-7: Enhanced Strain Hardening During Plastic Deformation of FCC Multi-Principal Element Alloys with L12 Nanodomains
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E-9: Expansion of Natural Mixing Guided Design via Understanding the Solidification Behavior
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Effect of SFE on Mechanical Properties in Co-Cr-Mo-Ni Medium Entopy Alloys
Effects of Cerium Addition and Post-Annealing on Microstructures and Mechanical Properties of CoCrNi Medium Entropy Alloy Films
Electronic Descriptors for Dislocation Deformation Behavior and Intrinsic Ductility in bcc High-Entropy Alloys
Engineering Multi-Principal Element Alloys for Hard Metal Binders
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Factors Affecting Calculated Properties of High-Entropy Alloys (HEAs) Using Density Functional Theory
Formation of Local Chemical Ordering in FCC HEAs and Its Effect on the Deformation Behaviors
Fracture Resistance of Refractory High-Entropy Alloys
Fracture Toughness and Deformation Mechanisms in Cantor-Based Medium Entropy Alloys
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High-Throughput Multiscale Modeling of Solidification of Refractory High Entropy Alloys
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Intermetallic Alloys: Ductility, Structural Order, and High Entropy or Not
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Interstitial Engineering of BCC Refractory Multi-Principal Element Alloys and their Dislocation Pathways
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Light Single-Phase Al-Based Complex Concentrated Alloy with High Specific Strength
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Material Design for Nuclear Applications, High Entropy Alloys in Extreme Environments
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Microstructure and Mechanical Properties of New Compositionally-Complex Fe-Cr-Mn-Al Ferritic Stainless Steels Free of σ-Phase, χ-Phase and 475 °C Embrittlement
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Precipitation/TRIP-Induced Heterogeneous Microstructures in Non-Equiatomic CoCrNi Medium Entropy Alloys to Achieve Superior Strength-Ductility Combination
Quantification of Lattice Distortions in Complex Concentrated Alloys by X-Ray Diffuse Scattering
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Single-Crystal Mechanical Properties of FCC High-Entropy Alloys
Stability of the B2 Phase in Al-Nb-Ta-Ti-Zr Refractory High-Entropy Superalloys: Resolving Identification Conflicts and Offering Practical Solutions
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Superior High-Temperature Strength in a Supersaturated Refractory High-Entropy Alloy
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The Thermodynamics of Mechanical Behavior in BCC Refractory Compositionally Complex Alloys
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