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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys V: Mechanical Behavior
Presentation Title Complex deformation behavior of a partially recrystallized metastable medium-entropy alloy: In-situ synchrotron X-ray diffraction study
Author(s) Jae Heung Lee, Hyeonseok Kwon, Gang Hee Gu, Ji Yeong Lee, Sang Guk Jeong, Emad Maawad, Changwan Ha, Jae Bok Seol, Sun Ig Hong, Sangbong Yi, Hyoung Seop Kim
On-Site Speaker (Planned) Jae Heung Lee
Abstract Scope Ferrous medium-entropy alloys (FeMEAs), leveraging deformation-induced martensitic transformation (DIMT), demonstrate excellent strain-hardening ability. Partial recrystallization was employed to improve the low yield strength, resulting in a complex microstructure that activates DIMT in both ReX and non-ReX regions, posing significant analytical challenges. In this study, we perform in-situ synchrotron X-ray diffraction to quantitatively analyze each deformation mechanism. Peak deconvolution enables separate tracing of the deformation behavior of the ReX and non-ReX FCC domains, revealing the stress partitioning between them. DIMT kinetics in each domain are also investigated, and we distinctively analyze the contributions of DIMT occurring in each domain on the global strain-hardening rate. The results suggest that the predominant contribution shifts from DIMT in the ReX domain to DIMT in the non-ReX domain as deformation progresses. This work demonstrates how a partially recrystallized metastable FeMEA exhibits superior mechanical properties and provides insights into analyzing the complex deformation behavior.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Mechanical Properties, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Accelerated screening of composition-structure-property relationships in MPEAs
Accurate Determination of the Deformation Mechanisms in Refractory Compositionally Complex Alloys
Achieving Deformation-Induced Nano-sized Twins and hcp Structures in FCC Complex Concentrated Alloys Under Charpy Impact Testing
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
Comparison of NbxMo1-x and (VNbTa)xMo1-x Refractory MPEA Thin Films by In Situ Microcantilever Beam Bending
Complex deformation behavior of a partially recrystallized metastable medium-entropy alloy: In-situ synchrotron X-ray diffraction study
Compositionally Tuned Cryogenic Plasticity in TiZrHf-Based HCP High-Entropy Alloys
Creep behavior of CoCrNi-based alloys
Creep Properties of NbTaTi-Based Refractory High-Entropy Alloys
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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)
Examining the influence of multiphase evolution and elemental partitioning on mechanical behavior in Nb-V-Zr alloys
Excellent tensile properties in a Al0.3CoFeNi High Entropy Alloy attributed to ordering phase transformations
Experimental Study of Corrosion, Wear and Biocompatibility Behavior of Novel Senkov-Derivative Refractory High-Entropy Alloys
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