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Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature

D.G. Leo Prakash, R Ding, R.J Moat, I Jones, P.J Withers, J. Quinta da Fonseca, M Preuss, Leo Prakash Orcid Logo

Materials Science and Engineering: A, Volume: 527, Issue: 21-22, Pages: 5734 - 5744

Swansea University Author: Leo Prakash Orcid Logo

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Abstract

This study examines the possibility of twinning to occur in Ti-6Al-4 V during moderate (4 - 14%) uniaxial compression at room temperature using a slow strain rate (10−6s−1). To do this, the starting material was manufactured to have strong basal texture components in the transverse and normal direct...

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Published in: Materials Science and Engineering: A
ISSN: 0921-5093
Published: 2010
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URI: https://cronfa.swan.ac.uk/Record/cronfa15812
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spelling 2015-11-02T14:22:03.4961079 v2 15812 2013-09-09 Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature bd72868c48af6c0b04bf9f6bb48ce324 0000-0002-8812-8927 Leo Prakash Leo Prakash true false 2013-09-09 MTLS This study examines the possibility of twinning to occur in Ti-6Al-4 V during moderate (4 - 14%) uniaxial compression at room temperature using a slow strain rate (10−6s−1). To do this, the starting material was manufactured to have strong basal texture components in the transverse and normal directions but not in the rolling direction. After only 6% compressive deformation parallel to the rolling direction it was possible to indentify a significant texture change introducing a strong basal texture component in the rolling direction. TEM analysis provided evidence of twins within grains, but at too low a volume fraction to explain the texture changes. Detailed EBSD mapping was carried out and showed an increasing number of entire grains to have their c-axis aligned with the loading direction in the deformed material, suggestive of entire grain twinning. The root cause for sudden complete grain twinning can only be speculated about at the moment, but it is suggested that the stress required for twin nucleation is significantly higher than that required for their propagation. Journal Article Materials Science and Engineering: A 527 21-22 5734 5744 0921-5093 Titanium alloys, Twinning, Deformation texture, electron backscattering diffraction (EBSD), transmission electron microscopy (TEM) 20 8 2010 2010-08-20 10.1016/j.msea.2010.05.039 http://www.sciencedirect.com/science/article/pii/S0921509310005514 For the first time, it has been confirmed that α+β Ti alloys undergo deformation twinning at low strain rates. Since the final textural control is critical, this finding has a high impact to titanium and aerospace industry, also highly acknowledged in the conference TMS-2010 (Session Chair: Dr. S.L. Semiatin, Air Force Research Laboratory, Wright-Patterson Air Force Base, OH; Lee.SEMIATIN@WPAFB.AF.mil). Furthermore, this is published in one of the leading journals in Materials Engineering (Materials Science and Engineering A, 5 year Impact factor: 2.349, citations: 10). COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2015-11-02T14:22:03.4961079 2013-09-09T11:16:43.0011119 College of Engineering Engineering D.G. Leo Prakash 1 R Ding 2 R.J Moat 3 I Jones 4 P.J Withers 5 J. Quinta da Fonseca 6 M Preuss 7 Leo Prakash 0000-0002-8812-8927 8
title Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
spellingShingle Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
Leo Prakash
title_short Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
title_full Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
title_fullStr Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
title_full_unstemmed Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
title_sort Deformation twinning in Ti-6Al-4V during low strain rate deformation to moderate strains at room temperature
author_id_str_mv bd72868c48af6c0b04bf9f6bb48ce324
author_id_fullname_str_mv bd72868c48af6c0b04bf9f6bb48ce324_***_Leo Prakash
author Leo Prakash
author2 D.G. Leo Prakash
R Ding
R.J Moat
I Jones
P.J Withers
J. Quinta da Fonseca
M Preuss
Leo Prakash
format Journal article
container_title Materials Science and Engineering: A
container_volume 527
container_issue 21-22
container_start_page 5734
publishDate 2010
institution Swansea University
issn 0921-5093
doi_str_mv 10.1016/j.msea.2010.05.039
college_str College of Engineering
hierarchytype
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/S0921509310005514
document_store_str 0
active_str 0
description This study examines the possibility of twinning to occur in Ti-6Al-4 V during moderate (4 - 14%) uniaxial compression at room temperature using a slow strain rate (10−6s−1). To do this, the starting material was manufactured to have strong basal texture components in the transverse and normal directions but not in the rolling direction. After only 6% compressive deformation parallel to the rolling direction it was possible to indentify a significant texture change introducing a strong basal texture component in the rolling direction. TEM analysis provided evidence of twins within grains, but at too low a volume fraction to explain the texture changes. Detailed EBSD mapping was carried out and showed an increasing number of entire grains to have their c-axis aligned with the loading direction in the deformed material, suggestive of entire grain twinning. The root cause for sudden complete grain twinning can only be speculated about at the moment, but it is suggested that the stress required for twin nucleation is significantly higher than that required for their propagation.
published_date 2010-08-20T03:25:21Z
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score 10.877888