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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Hume-Rothery Symposium on Alloy Microstructure Science and Engineering
Presentation Title Ordering Induced Phase Stabilities and Transformation Pathways in FCC Based Complex Concentrated Alloys or High Entropy Alloys
Author(s) Sriswaroop Dasari, Abhishek Sharma, Bharat Gwalani, Stephane Gorsse, Rajarshi Banerjee
On-Site Speaker (Planned) Rajarshi Banerjee
Abstract Scope Adding elements such as Al or Ti to near random face-centered cubic (FCC) solid solutions, such as CoFeNi or CoCrFeNi, introduces strong ordering tendencies in high entropy alloys (HEAs) or complex concentrated alloys (CCAs). This presentation will demonstrate the strong influence of Al addition to equiatomic CoFeNi on the stability and metastability of ordered phases (e.g. L12 and B2), and the consequent phase transformation pathways. A case study will be presented from a model Al0.3CoFeNi HEA/CCA wherein the phase stability (and attendant metastability) can lead to many different microstructures, including a homogeneous distribution of nanometer scale L12 (gamma prime-like) precipitates within the FCC matrix, ordered B2 precipitates distributed within the FCC matrix, a combination of L12 and B2 precipitates, and a complex four-phase hierarchical nano-lamellar microstructure consisting of alternating lamellae of FCC + L12 and B2 + BCC within eutectoid-like colonies. The underlying thermodynamic and kinetic factors will be discussed.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Phase Transformations, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Diffuse Scattering, Displacement Short-range Ordering, and Phonons in Pre-martensitic State
A Novel Growth Mechanism of the Alpha Phase in Titanium Alloys
A Specialty Alloy Manufacturer’s Perspective of How Computation Modeling of Microstructure Evolution Can Help with Alloy Design and Product Development
CALPHAD-based Kinetic Simulations for Metallurgical Practices
Characterization and Modeling of Concurrent Precipitation in Mg-Al-Sn Alloys Using an Improved Kampmann-Wagner Numerical (KWN) Model
Combined Creep and Fatigue Modeling
Data for Quantitative Phase Field Modeling
Determination of Mechanistic Information for Simulation Schemes of Transformation Pathways and Deformation Behavior in B2/BCC Refractory Complex Concentrated Alloys
Dynamic Local Phase Transformations: A New Creep Strengthening Mechanism in Ni-Base Superalloys
Explore the Shear Component in Precipitate Plate Formation in Light Alloys
Friction-mediated Subsurface Structural Transformations
High-Throughput Experiments for Computational Thermodynamics and Kinetics
Invention and Applications of Universal Machine Learning Interatomic Potential
Is Molar Gibbs Free Energy Always a Chemical Potential?
Linkage between Microstructure and Mechanical Properties in Alpha-Beta Titanium Alloys
Linking Phenomenological Theories of Phase Transformations to First-principles Descriptions of Solids
Nucleation Mechanisms of GP Zones and η′ Precipitates in Al-Zn-Mg Alloys
On Slip Irreversibility during Cyclic Deformation of FCC Alloys
Ordering Induced Phase Stabilities and Transformation Pathways in FCC Based Complex Concentrated Alloys or High Entropy Alloys
Perspectives on Metal Science for Materials Design
Revisiting Classic Recrystallization Experiments with Modern Simulation: Understanding the Mechanisms Behind the Development of Cube Orientation in Medium to High Stacking-fault Energy FCC Metals
Self-assembled Nanostructures in Coherent Two-phase Systems: Crystallography Theory
Shuffle Transformation in Titanium Alloys
Stability and Growth Kinetics of Deformation Twin Embryos in Beta Ti Alloys
Thermodynamic and Kinetic Studies on Microstructure Changes in Additive Manufacturing
Through-process Modeling of Local Mechanical Properties of Cast Aluminum Alloys
Unlocking the Versatility of Additive Manufacturing: Alloy Development and Materials Discovery for Resource-constrained Environments Based on Commercial Feedstock Materials
William Hume-Rothery Award Lecture: Deformation Pathway Engineering and Compositionally and Structurally Modulated Alloy Design

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