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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,


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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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