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Meeting

2022 TMS Annual Meeting & Exhibition

Symposium

Advances in Multi-Principal Elements Alloys X: Structures and Modeling

Presentation Title

Microstructure and Mechanical Properties of Medium-entropy Alloys with High-density Nano Precipitates

Author(s)

Che-Wei Tsai, Hung-Chih Liu, Pai-Keng Shen, Jein-Wei Yeh, Cheng-Yao Huang, Hung-Wei Yen

On-Site Speaker (Planned)

Che-Wei Tsai

Abstract Scope

Medium-entropy alloys (MEAs) have attracted considerable research attention because of their excellent mechanical properties. In these, the γ' phase has been utilized as a strengthening phase. However, the η phase has not been widely investigated. Herein, we explain the precipitation behavior of the η phase in a nonequimolar CoCrNiTi MEA. The MEA adopts a face-centered cubic (FCC) matrix upon η phase precipitation. Various characterization techniques were used to analyze the microstructure, phase structure, and phase composition of the as-prepared MEA. The FCC-η interface exhibited semi-coherence. This work facilitates a novel approach to ultrahigh-strength alloy production.

Proceedings Inclusion?

Planned: TMS Journal: Metallurgical and Materials Transactions

Keywords

High-Entropy Alloys, Mechanical Properties, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A-12: KMC Modeling of Screw Dislocation Strength in Equiatomic bcc Refractory Alloys

A-13: Phase Transition Zones in Compositionally Complex Alloy Films

A High-throughput Investigation of Microstructure-property Relationships in NbVZr

A Method to Predict Fluctuations in the Fault Energy Landscape of FCC Solid Solutions

Atomistic Modeling of Diffusive High Temperature Plasticity in BCC Refractory-based MPEAs

Atomistic Modeling of Vacancy Concentration and Tracer Diffusion in Ni-CoCrFeMn Alloys

Atomistic Simulations of Mechanical Responses and Defect Activities in B2 Low-to-high-entropy Intermetallic Compounds

Beyond Configurational Entropy: A Harmonic Multi-principal Elements Alloy

Characterization of High-entropy Titanate Pyrochlore Oxide Single Crystals

Chemical Randomness and Lattice Distortions in Multi-principal Elements Alloys: Advances in Characterization

Combination of High Throughput Experiments and ICME Approaches to Discover the Composition Space for Lightweight High Entropy Alloys

Computational Study of Thermodynamic and Thermoelectric Properties of Al-Co-Cr-Fe-Ni and Al-Cu-Fe-Mn-Ni High-entropy Alloys

Controlling Short-range Ordering to Simultaneously Enhance Strength and Ductility of High-entropy Alloys

Critical Shear Stress Distributions and Dislocation Mobility in FeNiCrCoCu High Entropy Alloys via Atomistic Simulations

Data-driven Discovery of High-entropy Alloys

Developing Interatomic Potentials for High Entropy Alloys

Development of Novel Refractory High-entropy Alloys via High-throughput Alloy-design Approach

Dislocation Motions in Refractory Multi-principal Alloys and Effects of Chemical Order and Disorder

Effective Atomic Size in Multi-principal Element Alloys

Effects of Short-range Order on Thermodynamic Properties of AlxCoCrFeNi High-entropy Alloys

Electron Diffraction-based Studies of Ordering and Mechanical Behavior in FCC and BCC Multi-principal Element Alloys

Energy Landscape of Deformation Twinning in Multi-principal Elements bcc Alloys

Expediting the Materials Discovery Process of MPEAs through Efficient Coupling of High-throughput Density Functional Theory, Molecular Dynamics and Machine Learning Techniques

Experimental, Theoretical, and Numerical Study for Dynamic Strain Aging in HfNbTaTiZr High-entropy Alloys

Exploration of Refractory Complex Concentrated Alloys through the Use of High-throughput Calculations and Experimentation

Factors Affecting Stacking Fault Energy in Concentrated Alloys Using Density Functional Theory and Machine Learning

First-principles-based High-throughput Prediction of the Phase Stability of Refractory Complex Concentrated Alloys

First-principles Exploration of Diffusion Activation Energy in CoCrNi and CoCrFeNiMn High-entropy Alloys, with Comparison to Creep Activation Energy

First-principles Study of Quaternary High Entropy Alloys Consisting of Fe-Ni-Co-Cr-Mn/Pd

High-throughput Ion Irradiation and Microstructural Characterization of Multi-principal-element Alloys

High-throughput Mapping and Screening of Refractory High Entropy Alloy Property Space

High Thermal Stability B2 Precipitates in a Ru-containing Multi-principal Element Alloy

In-situ 4D-STEM Imaging of the Synergistic Deformation Mechanisms Responsible for the Fracture Resistance in CrCoNi

Interactions between a Dislocation and a Twin Boundary/HCP Lamella and Their Temperature Dependence in Ni-based Equiatomic Alloys

Interplay between Dislocations and Correlated Stress Environment in Random Alloys

Jerky Dislocation Motion in Multi-principal Element Alloys: From Atomic Peierls Stress to Dislocation Mobility

Local Configuration Effects on Vibrational Properties of BCC MPEAs

Machine Learning Enabled Defect Energies Prediction in Concentrated Alloys

Machine Learning Guided Descriptor Selection for Predicting Corrosion Resistance in Multi-principal Element Alloys (MPEAs)

Magnetism in Metastable and Annealed HEAs of (FeNiCrMn)

Mechanical Properties and Deformation Behavior of a Refractory Multiprincipal Element Alloy under Cyclic Loading

Melting Temperature Prediction of Multi-principal Elements Alloys Using Ab-initio Calculations

Metastability and Phase Selection in High Entropy Alloys

Microstructural Inversion Accompanied by B2 to hP18 Phase Transformation in a BCC Based Refractory Complex Concentrated Alloy

Microstructure and Mechanical Properties of Medium-entropy Alloys with High-density Nano Precipitates

Mixing and Diffusion at Internal Interfaces in High Entropy Alloys

Modeling the Effect of Stress and Composition on the Stability of Lomer/Lomer-Cottrell Dislocations

Multiscale Dynamics of the Oxide Scale in High-entropy Alloys

Multiscale Modeling and Design of High Entropy Alloys

Novel Co-free Multi Principal Element Alloys (MPEAs) for Nuclear Applications: Computational Design and Experimental Evaluation

NOW ON-DEMAND ONLY - Design of High Temperature RCCAs Using Ordered Thermally Stable Structures

NOW ON-DEMAND ONLY - Theory of Yield Strength in BCC High Entropy Alloys

Phase Field Modelling of Transformation Pathways and Microstructural Evolution in Multi-principal Element Alloys (MPEAs)

Predicting Fundamental Properties of Refractory Multicomponent Alloys Using Electronic Descriptors and Statistical Learning

Simulations of Deformation and Fracture in Multi-principal Element Alloys

Size Effects in a Dual Phase High Entropy Alloy

Slip Localization in the Refractory High Entropy Alloy HfNbTaTiZr at Room Temperature

TEM Study of a Refractory Complex Concentrated Alloy with BCC/B2 Microstructure

The Impact of Short-range Order on Atomic Diffusions in Multi-principal Elements Alloys

Transformation Behavior and Superelasticity of TiZrHfNiCoCu Multi-component High-temperature Shape Memory Alloys

Understanding Chemical Short-range Ordering/Demixing Coupled with Lattice Distortion in Solid Solution High Entropy Alloy

Vacancy Defects: Formation Energy and Migration Paths in Multi-principal-element Alloys (MPEAs)

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