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The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy

D.G. Leo Prakash, P Honniball, D Rugg, P.J Withers, J. Quinta da Fonseca, M Preuss, Leo Prakash Orcid Logo

Acta Materialia, Volume: 61, Issue: 9, Pages: 3200 - 3213

Swansea University Author: Leo Prakash Orcid Logo

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Abstract

Microstructure and texture evolution have been investigated in both α and β phases during the hot rolling of β-quenched Ti–6Al–4V at 800 and 950 °C, followed by annealing at 950 °C and air cooling using detailed electron backscattered diffraction mapping. The textures of primary and secondary α in t...

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Published in: Acta Materialia
ISSN: 1359-6454
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa15811
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spelling 2015-11-02T14:18:53.6728743 v2 15811 2013-09-09 The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy bd72868c48af6c0b04bf9f6bb48ce324 0000-0002-8812-8927 Leo Prakash Leo Prakash true false 2013-09-09 MTLS Microstructure and texture evolution have been investigated in both α and β phases during the hot rolling of β-quenched Ti–6Al–4V at 800 and 950 °C, followed by annealing at 950 °C and air cooling using detailed electron backscattered diffraction mapping. The textures of primary and secondary α in the bi-modal microstructure were analysed separately, and the high-temperature β orientations were calculated by a variant based reconstruction from the inherited αs orientations. Crystal plasticity finite element modelling has been employed to predict the rolling texture based on common α phase slip systems and compare with the measured α texture. It was found that despite the severe deformation during rolling, a large proportion of the primary α grains retain a Burgers relationship with the β phase. Consequently, the β phase in combination with a variant selection mechanism seems to control the α texture, which explains the discrepancy between predicted and measured rolling textures. The consequence of this mechanism for macrozone formation is also discussed. Journal Article Acta Materialia 61 9 3200 3213 1359-6454 Titanium alloys; Thermomechanical processing; Texture; Macrozones; Electron backscattered diffraction (EBSD) 12 5 2013 2013-05-12 10.1016/j.actamat.2013.02.008 http://www.sciencedirect.com/science/article/pii/S1359645413001262 This research is published in, the No.1 ranked journal in Metallurgy , Acta Materialia (5 year Impact factor: 4.395). For the first time, this clearly point out the critical role of high temperature beta phase on the development of different alpha phase texture and macrozones during thermomechanical processing of a technologically important metallic material (Ti-6Al-4V). These research findings are of particular practical consequences to Titanium and Aerospace industry as it demonstrates that certain hot rolling procedures might be applied to tailor texture. The importance of this publication is recognized by the UK industries, Timet (Matthew.Thomas@Timet.com) and Rolls-Royce (David.Rugg@rolls-royce.com). COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2015-11-02T14:18:53.6728743 2013-09-09T11:07:30.9174127 College of Engineering Engineering D.G. Leo Prakash 1 P Honniball 2 D Rugg 3 P.J Withers 4 J. Quinta da Fonseca 5 M Preuss 6 Leo Prakash 0000-0002-8812-8927 7
title The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
spellingShingle The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
Leo Prakash
title_short The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
title_full The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
title_fullStr The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
title_full_unstemmed The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
title_sort The effect of β phase on microstructure and texture evolution during thermomechanical processing of α+β Ti alloy
author_id_str_mv bd72868c48af6c0b04bf9f6bb48ce324
author_id_fullname_str_mv bd72868c48af6c0b04bf9f6bb48ce324_***_Leo Prakash
author Leo Prakash
author2 D.G. Leo Prakash
P Honniball
D Rugg
P.J Withers
J. Quinta da Fonseca
M Preuss
Leo Prakash
format Journal article
container_title Acta Materialia
container_volume 61
container_issue 9
container_start_page 3200
publishDate 2013
institution Swansea University
issn 1359-6454
doi_str_mv 10.1016/j.actamat.2013.02.008
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
url http://www.sciencedirect.com/science/article/pii/S1359645413001262
document_store_str 0
active_str 0
description Microstructure and texture evolution have been investigated in both α and β phases during the hot rolling of β-quenched Ti–6Al–4V at 800 and 950 °C, followed by annealing at 950 °C and air cooling using detailed electron backscattered diffraction mapping. The textures of primary and secondary α in the bi-modal microstructure were analysed separately, and the high-temperature β orientations were calculated by a variant based reconstruction from the inherited αs orientations. Crystal plasticity finite element modelling has been employed to predict the rolling texture based on common α phase slip systems and compare with the measured α texture. It was found that despite the severe deformation during rolling, a large proportion of the primary α grains retain a Burgers relationship with the β phase. Consequently, the β phase in combination with a variant selection mechanism seems to control the α texture, which explains the discrepancy between predicted and measured rolling textures. The consequence of this mechanism for macrozone formation is also discussed.
published_date 2013-05-12T03:25:21Z
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score 10.8779125