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Thermomechanical processing map in retaining {100}// ND texture via strain-induced boundary migration recrystallization mechanism
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Ji, Mo, Slater, Carl and Davis, Claire (2020) Thermomechanical processing map in retaining {100}// ND texture via strain-induced boundary migration recrystallization mechanism. Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, 51 . pp. 6498-6504. doi:10.1007/s11661-020-06047-x ISSN 1073-5623.
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Official URL: http://dx.doi.org/10.1007/s11661-020-06047-x
Abstract
The feasibility of establishing thermomechanical conditions to promote {100}// ND fiber texture via strain-induced boundary migration (SIBM) recrystallization mechanism in a non-grain oriented (NGO) electrical steel was investigated. Single hit uniaxial compression at various temperatures and strains have been applied on Fe- 6wt. % Si to establish the relationship between stored energy and the softening mechanisms. Recovery only, recrystallization by SIBM or by subgrain growth (SGG) have been observed depending on the stored energy level. A strong {100}// ND fiber recrystallization texture, i.e. 45% area fraction, was seen in the sample which was deformed to 0.2 strain at 650 C then annealed at 1000 C for 15 minutes, whereas only 13% {100}// ND fiber component was observed after 0.4 strain at 500 C followed by the same annealing treatment. By examining the same microstructural region before and after annealing via EBSD, it has been shown that {100}// ND textured recrystallized grains were formed adjacent to the {100}// ND textured deformed matrix. Low stored energy has been shown to favor the formation of {100}// ND texture recrystallized grains via SIBM recrystallization mechanism attributed to its slow recrystallization nucleation rate. The results from the deformation studies have been used to suggest a processing window map concept to define the recovery, SIBM and SGG regions for the starting as-cast columnar microstructure.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TN Mining engineering. Metallurgy |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
Library of Congress Subject Headings (LCSH): | Metals -- Thermomechanical treatment , Recrystallization (Metallurgy) , Steel, Electrical | ||||||||
Journal or Publication Title: | Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science | ||||||||
Publisher: | Springer New York LLC | ||||||||
ISSN: | 1073-5623 | ||||||||
Official Date: | December 2020 | ||||||||
Dates: |
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Volume: | 51 | ||||||||
Page Range: | pp. 6498-6504 | ||||||||
DOI: | 10.1007/s11661-020-06047-x | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 21 October 2020 | ||||||||
Date of first compliant Open Access: | 22 October 2020 | ||||||||
RIOXX Funder/Project Grant: |
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