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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys V: Mechanical Behavior
Presentation Title Precipitation Behavior and Hardening Response in Fe-Mn-Al-C Based Multi-Principal Element Alloys
Author(s) Juhyeok Kwon, Alfredo Navarrete, Ritbik Kumar, Chandra Nath, Jianxun Hu, John Sutherland, Eric Lass, Peter Liaw
On-Site Speaker (Planned) Juhyeok Kwon
Abstract Scope Fe-Mn-Al-C based multi-principal element alloys (MPEAs) are promising materials for improving energy efficiency in the automotive industry by offering significant weight reduction. Their high Mn content provides enhanced mechanical properties but limits formability and weldability. To overcome these limitations, Fe-Mn-Al-C alloys with reduced Mn content were developed, and studies on their phase stability and precipitate formation were conducted. Thermodynamic design and subsequent thermomechanical processing led to improved mechanical properties of the alloys. Without additional alloying elements, the precipitates formed primarily along grain and phase boundaries. The addition of alloying elements promoted the formation of uniformly distributed nanosized precipitates within the grains. These precipitates enhanced both strength and ductility. This trend implies that controlling precipitation is an effective strategy for designing lightweight MPEAs with tunable mechanical performance.
Proceedings Inclusion? Planned:
Keywords Iron and Steel, Mechanical Properties, High-Entropy Alloys

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Accelerated MD investigation of screw dislocation strengthening mechanism in BCC Multi-Principal element Alloys
Accelerated screening of composition-structure-property relationships in MPEAs
Accurate Determination of the Deformation Mechanisms in Refractory Compositionally Complex Alloys
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Additive Manufacturing: From Complex Alloys to Simple Alloys
Advanced Characterization of Engineering Applications of a Strong and Ductile Medium Entropy Alloy with Known Short-Range Order
Advanced In-Situ Diffraction Studies on Multi-Principal Element Alloys and Intermetallics
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Atomic-level defects on dislocation lines and their role in refractory complex alloy strength
Atomistic Tracking of Self Diffusivity in Multi-Principal Element Alloys
Bi-continuous W-rich Refractory High Entropy Alloy-Cu Composite: Toward material innovation of nuclear reactor coolant system
CALPHAD-Guided Development and Mechanical Evaluation of Dual-Phase CoFeNiVTi Alloys
Combinatorial microstructure & stoichiometry-based and hybrid machine learning & domain knowledge for hardness mapping in a high-entropy alloy
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Deformation Characteristics and Phase Transformation in a B2-Base High-Entropy Alloy (HEA)
Design and Development of Lightweight Medium and High-Entropy FeMnAlC Steels
Dislocation Analysis of CrCoNi using Micropillar Experiments and Molecular Dynamics Simulations
Dislocation Properties in Refractory Compositionally Complex Alloys
Dry Sliding Wear of Cu-Alloyed Low-Carbon Steels: Role of Oxides and Quenching Temperature
Ductile-Brittle Transitions in bcc Refractory High-Entropy Alloys
Dynamic properties of NbTaTiHf High-Entropy Alloy
EBSD analysis of microstructure evolution in hot-deformed WMoFeNi MPEA Alloy system
Effect of minor Ge/Mo/W on the corrosive behavior in FCC CoCrFeNi high-entropy alloy
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Evolution of the BCC + B2 microstructure and its high temperature stability in refractory high entropy alloys (INVITED TALK)
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