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Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel

Diween Hawezy, Soran Birosca

Acta Materialia, Volume: 216, Start page: 117141

Swansea University Author: Diween Hawezy

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Abstract

An investigation into the recovery and recrystallization of the two major texture fibres, namely α and γ, during annealing yielded subtle differences between the two. It is reported that with thermal activation static recovery occurs, where dislocation free sub-grains are formed and tend to grow, co...

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Published in: Acta Materialia
ISSN: 1359-6454
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57323
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spelling 2021-08-03T15:28:55.7102615 v2 57323 2021-07-15 Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel 6e4acc8a46efa9a375bc4f426ef0bd5a Diween Hawezy Diween Hawezy true false 2021-07-15 FGSEN An investigation into the recovery and recrystallization of the two major texture fibres, namely α and γ, during annealing yielded subtle differences between the two. It is reported that with thermal activation static recovery occurs, where dislocation free sub-grains are formed and tend to grow, coalesce, or bulge out. This can form new strain-free recrystallisation nuclei, with the coalescence or bulging phenomenon depending on stored energy and geometrically dislocation density (GND). Due to low lattice curvature or otherwise, it was found α-fiber has low stored energy and GND values which favours bulging into neighbouring deformed grains as opposed to subgrain coalescence. In contrast, γ-fiber tends to undergo rapid subgrain coalescence due to high lattice curvature, i.e., GND and stored energy. The newly formed grains from both texture fibers were also found to typically differ in size, as γ-fiber has a much higher nucleation rate with rapid subgrain coalescence. Furthermore, it was discovered that Cube texture component though nucleating in higher rates within α-fiber, nucleates in all regions of high dislocation densities but will only survive in regions with low recovery and nucleation rates, typically α-fiber. Moreover, Goss texture component was found to preferentially nucleate from γ-fiber. Journal Article Acta Materialia 216 117141 Elsevier BV 1359-6454 Recovery, Recrystallization, Texture Evolution, Fibre Texture, Electrical Steel 1 9 2021 2021-09-01 10.1016/j.actamat.2021.117141 https://researchportal.port.ac.uk/portal/en/publications/disparity-in-recrystallization-of---fibers-and-its-impact-on-cube-texture-formation-in-nonoriented-electrical-steel(8849c687-047d-40c3-b74e-b215d2b09b19).html COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-08-03T15:28:55.7102615 2021-07-15T09:36:22.1324407 College of Engineering Engineering Diween Hawezy 1 Soran Birosca 2
title Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
spellingShingle Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
Diween Hawezy
title_short Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
title_full Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
title_fullStr Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
title_full_unstemmed Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
title_sort Disparity in recrystallization of α- & γ-fibers and its impact on Cube texture formation in non-oriented electrical steel
author_id_str_mv 6e4acc8a46efa9a375bc4f426ef0bd5a
author_id_fullname_str_mv 6e4acc8a46efa9a375bc4f426ef0bd5a_***_Diween Hawezy
author Diween Hawezy
author2 Diween Hawezy
Soran Birosca
format Journal article
container_title Acta Materialia
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container_start_page 117141
publishDate 2021
institution Swansea University
issn 1359-6454
doi_str_mv 10.1016/j.actamat.2021.117141
publisher Elsevier BV
college_str College of Engineering
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hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description An investigation into the recovery and recrystallization of the two major texture fibres, namely α and γ, during annealing yielded subtle differences between the two. It is reported that with thermal activation static recovery occurs, where dislocation free sub-grains are formed and tend to grow, coalesce, or bulge out. This can form new strain-free recrystallisation nuclei, with the coalescence or bulging phenomenon depending on stored energy and geometrically dislocation density (GND). Due to low lattice curvature or otherwise, it was found α-fiber has low stored energy and GND values which favours bulging into neighbouring deformed grains as opposed to subgrain coalescence. In contrast, γ-fiber tends to undergo rapid subgrain coalescence due to high lattice curvature, i.e., GND and stored energy. The newly formed grains from both texture fibers were also found to typically differ in size, as γ-fiber has a much higher nucleation rate with rapid subgrain coalescence. Furthermore, it was discovered that Cube texture component though nucleating in higher rates within α-fiber, nucleates in all regions of high dislocation densities but will only survive in regions with low recovery and nucleation rates, typically α-fiber. Moreover, Goss texture component was found to preferentially nucleate from γ-fiber.
published_date 2021-09-01T04:13:24Z
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