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Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument

Soran Birosca Orcid Logo, Ali Nadoum, Diween Hawezy, Fiona Robinson, Winfried Kockelmann

Acta Materialia, Volume: 185, Pages: 370 - 381

Swansea University Author: Soran Birosca Orcid Logo

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DOI (Published version): 10.1016/j.actamat.2019.12.023

Abstract

The first Si-Fe electrical steel was produced in 1905, and the grain-oriented steel was discovered in 1930 after Goss demonstrated how optimal combinations of heat treatment and cold rolling could produce a texture giving Si-Fe strip good magnetic properties when magnetised along its rolling directi...

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Published in: Acta Materialia
ISSN: 1359-6454
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53113
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spelling 2020-01-06T14:57:21.8817100 v2 53113 2020-01-06 Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument 3445603fcc2ff9d27b476a73b223a507 0000-0002-8380-771X Soran Birosca Soran Birosca true false 2020-01-06 EEN The first Si-Fe electrical steel was produced in 1905, and the grain-oriented steel was discovered in 1930 after Goss demonstrated how optimal combinations of heat treatment and cold rolling could produce a texture giving Si-Fe strip good magnetic properties when magnetised along its rolling direction. This technology has reduced the power loss in transformers greatly and remains the basis of the manufacturing process today. Since then many postulations reported on the mechanism on abnormal grain growth (AGG) which is the key for Si-Fe superior magnetic properties, however, none have provided a concrete understanding of this phenomenon. Here, we established and demonstrated a new theory that underlines the fundamental mechanistic approach of abnormal grain growth in 3% Si-Fe steel. It is demonstrated, that the external heat flux direction applied during annealing and Si atom positions in the solid solution disordered α-Fe cube unit cell that cause lattice distortions and BCC symmetry reduction are the most influential factors in the early stage of Goss AGG than what was previously thought to be dislocation related stored energy, grain boundary characteristics and grain size/orientation advantages. Journal Article Acta Materialia 185 370 381 Elsevier BV 1359-6454 Abnormal grain growth, Electrical steel, EBSD, Heat flow, Goss texture, Geometrically necessary dislocation, Neutron texture analysis 15 2 2020 2020-02-15 10.1016/j.actamat.2019.12.023 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2020-01-06T14:57:21.8817100 2020-01-06T14:57:21.8817100 Soran Birosca 0000-0002-8380-771X 1 Ali Nadoum 2 Diween Hawezy 3 Fiona Robinson 4 Winfried Kockelmann 5 53113__16205__e4aeff37990f472785ee3bcd3705adb9.pdf birosca2019.pdf 2020-01-06T15:08:05.3630272 Output 1448876 application/pdf Accepted Manuscript true 2020-12-17T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
spellingShingle Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
Soran Birosca
title_short Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
title_full Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
title_fullStr Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
title_full_unstemmed Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
title_sort Mechanistic approach of Goss abnormal grain growth in electrical steel: Theory and argument
author_id_str_mv 3445603fcc2ff9d27b476a73b223a507
author_id_fullname_str_mv 3445603fcc2ff9d27b476a73b223a507_***_Soran Birosca
author Soran Birosca
author2 Soran Birosca
Ali Nadoum
Diween Hawezy
Fiona Robinson
Winfried Kockelmann
format Journal article
container_title Acta Materialia
container_volume 185
container_start_page 370
publishDate 2020
institution Swansea University
issn 1359-6454
doi_str_mv 10.1016/j.actamat.2019.12.023
publisher Elsevier BV
document_store_str 1
active_str 0
description The first Si-Fe electrical steel was produced in 1905, and the grain-oriented steel was discovered in 1930 after Goss demonstrated how optimal combinations of heat treatment and cold rolling could produce a texture giving Si-Fe strip good magnetic properties when magnetised along its rolling direction. This technology has reduced the power loss in transformers greatly and remains the basis of the manufacturing process today. Since then many postulations reported on the mechanism on abnormal grain growth (AGG) which is the key for Si-Fe superior magnetic properties, however, none have provided a concrete understanding of this phenomenon. Here, we established and demonstrated a new theory that underlines the fundamental mechanistic approach of abnormal grain growth in 3% Si-Fe steel. It is demonstrated, that the external heat flux direction applied during annealing and Si atom positions in the solid solution disordered α-Fe cube unit cell that cause lattice distortions and BCC symmetry reduction are the most influential factors in the early stage of Goss AGG than what was previously thought to be dislocation related stored energy, grain boundary characteristics and grain size/orientation advantages.
published_date 2020-02-15T04:05:55Z
_version_ 1763753439788007424
score 11.012678

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