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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
Presentation Title Seeing the Shearing of Short-range Order with Dislocations in the High-entropy Alloy
Author(s) Jae-Bok Seol, Jongun Moon, Hyo Ju Bae, Jae Wung Bae, Hyokyung Sung, Jung Gi Kim, Hyoung Seop Kim
On-Site Speaker (Planned) Jae-Bok Seol
Abstract Scope Recent studies have dedicated to short-range order (SRO) visualization and its impact on complex concentrated solutions, through the combined electron-beam diffraction and atomic imaging of transmission electron microscopy. However, a key challenge has still remained as to how varying the uniaxial strain rates has a profound effect on the SRO degree, mechanical and thermal properties of high-entropy alloys (HEAs), particularly under near-constant stacking-fault energy conditions. Herein we found that, employing higher tensile strain rate under quasi-static conditions at 77 K, results in higher degree of SRO in an interstitially hardened Fe40Mn40Cr10Co10 (at%) alloy. This corresponds to the increased density of SRO domains, i.e., higher degree of SRO implies the higher amounts of SRO rather than SRO sizes. Additionally, we showed the shearing of such domains with successive dislocations inside the early formed planar slip band during the tensile tests.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Characterization,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Bcc-Superalloys Microstructure Templates: Tungsten to Titanium to Iron
Comparison of γ' and B2 Precipitates and Their Influence on the Mechanical Behavior of FeNiCoAl-based High-entropy Alloys
Core/Triple Shell Precipitates in Al-Er-Sc-Zr-(V,Nb,Ta) Alloys
Deformable Intermetallic Nanorods Leads to an Excellent Strength-ductility Combination in a High Entropy Alloy
Design of Precipitation Strengthened Metastable High Entropy Alloys
Free Energy Landscape, Transformation Pathway and Alloy Parameters Leading to Various Isostructural Ordered Precipitate Microstructures
High Temperature Deformation Pathways in Ordered L12- and Immm-based Compounds
Investigation of Nucleation Mechanisms Associated with the Formation of Coprecipitates in Ni-based Superalloys
Microstructural Engineering in NiCoCr Medium Entropy Alloys
Novel Nickel-based Alloys for High Temperature Structural Applications
On the Detailed Morphological and Chemical Evolution of Phases during Laser Powder Bed Fusion and Common Post-processing Heat Treatments of IN718
Optimizing Composition and Microstructure in Compositionally Complex Alloys Possessing bcc and B2 Mixtures
Precipitate Strengthening and Stabilization Mechanisms in Cast and Additively Manufactured Al-Cu-Mn-Zr Alloys
Precipitation of Ordered B2 Precipitates in BCC Al2.7CrMnTiV High-entropy Alloys
Seeing the Shearing of Short-range Order with Dislocations in the High-entropy Alloy
The Microstructural Design and Thermomechanical Processing of Compositionally Complex Alloys
The Origin and Stability of Nanostructural Hierarchy in Nickel-base Superalloys
The Role of Precipitate Size Distribution and Morphology on Ni Superalloy Deformation Micromechanisms
Tuning the Degree of Chemical Ordering in the Solid Solution of a Complex Concentrated Alloy and Its Impact on Mechanical Properties
Understanding the Role of Chemistry on Planar Fault Energies in A3B Compositions

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