Microband-driven martensitic transformation in as-hot-rolled metastable medium-entropy alloys

Jungwan Lee; Sujung Son; Seok Su Sohn; Jae Wung Bae; Hyoung Seop Kim

doi:10.1016/j.msea.2023.145735

Microband-driven martensitic transformation in as-hot-rolled metastable medium-entropy alloys

Jungwan Lee
, Sujung Son
, Seok Su Sohn
, Jae Wung Bae
, Hyoung Seop Kim^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Hot rolling triggers dynamic recrystallization and dislocation-based microbands. Dislocations within these microbands in as-hot-rolled metastable medium-entropy alloys prompt deformation-induced martensitic transformation at ambient temperature, a phenomenon not identifiable in the as-annealed counterparts. This results in ∼43% total elongation despite the as-rolled states with the added benefit of doubled yield strength.

Original language	English
Article number	145735
Journal	Materials Science and Engineering: A
Volume	886
DOIs	https://doi.org/10.1016/j.msea.2023.145735
Publication status	Published - 2023 Oct 17

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

Casting methods
Electron microscopy
Grains and interfaces
Phase transformation
Plasticity
Stress/strain measurements

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2023.145735

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title = "Microband-driven martensitic transformation in as-hot-rolled metastable medium-entropy alloys",

abstract = "Hot rolling triggers dynamic recrystallization and dislocation-based microbands. Dislocations within these microbands in as-hot-rolled metastable medium-entropy alloys prompt deformation-induced martensitic transformation at ambient temperature, a phenomenon not identifiable in the as-annealed counterparts. This results in ∼43\% total elongation despite the as-rolled states with the added benefit of doubled yield strength.",

keywords = "Casting methods, Electron microscopy, Grains and interfaces, Phase transformation, Plasticity, Stress/strain measurements",

author = "Jungwan Lee and Sujung Son and Sohn, \{Seok Su\} and Bae, \{Jae Wung\} and Kim, \{Hyoung Seop\}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

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day = "17",

doi = "10.1016/j.msea.2023.145735",

language = "English",

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journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Microband-driven martensitic transformation in as-hot-rolled metastable medium-entropy alloys

AU - Lee, Jungwan

AU - Son, Sujung

AU - Sohn, Seok Su

AU - Bae, Jae Wung

AU - Kim, Hyoung Seop

PY - 2023/10/17

Y1 - 2023/10/17

N2 - Hot rolling triggers dynamic recrystallization and dislocation-based microbands. Dislocations within these microbands in as-hot-rolled metastable medium-entropy alloys prompt deformation-induced martensitic transformation at ambient temperature, a phenomenon not identifiable in the as-annealed counterparts. This results in ∼43% total elongation despite the as-rolled states with the added benefit of doubled yield strength.

AB - Hot rolling triggers dynamic recrystallization and dislocation-based microbands. Dislocations within these microbands in as-hot-rolled metastable medium-entropy alloys prompt deformation-induced martensitic transformation at ambient temperature, a phenomenon not identifiable in the as-annealed counterparts. This results in ∼43% total elongation despite the as-rolled states with the added benefit of doubled yield strength.

KW - Casting methods

KW - Electron microscopy

KW - Grains and interfaces

KW - Phase transformation

KW - Plasticity

KW - Stress/strain measurements

UR - https://www.scopus.com/pages/publications/85172937473

U2 - 10.1016/j.msea.2023.145735

DO - 10.1016/j.msea.2023.145735

M3 - Article

AN - SCOPUS:85172937473

SN - 0921-5093

VL - 886

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 145735

ER -

Microband-driven martensitic transformation in as-hot-rolled metastable medium-entropy alloys

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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