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Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy

Martin Bache, Helen Davies Orcid Logo, William Davey, Thomas, Berment-Parr

Metals, Volume: 9, Issue: 11, Start page: 1200

Swansea University Authors: Martin Bache, Helen Davies Orcid Logo, William Davey

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DOI (Published version): 10.3390/met9111200

Abstract

The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption.Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety ofcost reduction...

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Published in: Metals
ISSN: 2075-4701
Published: MDPI AG 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa52224
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spelling 2023-03-17T11:00:46.8134664 v2 52224 2019-10-02 Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy 3453423659f6bcfddcd0a716c6b0e36a Martin Bache Martin Bache true false a5277aa17f0f10a481da9e9751ccaeef 0000-0003-4838-9572 Helen Davies Helen Davies true false 0818899a6320093e155d288466bd63de William Davey William Davey true false 2019-10-02 FGSEN The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption.Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety ofcost reduction opportunities, including improved machinability. Thermo-mechanical processing andits effects on microstructure and subsequent mechanical performance are characterised, including adetailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strongbehaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependentfatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation andfracture mechanisms responsible for controlling fatigue life are explored. The intimate relationshipbetween thermo-mechanical processing, micro-texture and fatigue crack initiation through thegeneration of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics aredemonstrated, independent of local microstructure. Journal Article Metals 9 11 1200 MDPI AG 2075-4701 Ti-407, dwell sensitive fatigue, quasi-cleavage facets, micro-texture, macro-zones 7 11 2019 2019-11-07 10.3390/met9111200 http://dx.doi.org/10.3390/met9111200 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2023-03-17T11:00:46.8134664 2019-10-02T10:06:39.0422353 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Martin Bache 1 Helen Davies 0000-0003-4838-9572 2 William Davey 3 Thomas 4 Berment-Parr 5
title Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
spellingShingle Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
Martin Bache
Helen Davies
William Davey
title_short Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
title_full Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
title_fullStr Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
title_full_unstemmed Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
title_sort Microstructural Control of Fatigue Behaviour in a Novel α + β Titanium Alloy
author_id_str_mv 3453423659f6bcfddcd0a716c6b0e36a
a5277aa17f0f10a481da9e9751ccaeef
0818899a6320093e155d288466bd63de
author_id_fullname_str_mv 3453423659f6bcfddcd0a716c6b0e36a_***_Martin Bache
a5277aa17f0f10a481da9e9751ccaeef_***_Helen Davies
0818899a6320093e155d288466bd63de_***_William Davey
author Martin Bache
Helen Davies
William Davey
author2 Martin Bache
Helen Davies
William Davey
Thomas
Berment-Parr
format Journal article
container_title Metals
container_volume 9
container_issue 11
container_start_page 1200
publishDate 2019
institution Swansea University
issn 2075-4701
doi_str_mv 10.3390/met9111200
publisher MDPI AG
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
url http://dx.doi.org/10.3390/met9111200
document_store_str 0
active_str 0
description The novel titanium alloy TIMETAL® 407 (Ti-407) has been developed as an alternative to Ti-6Al-4V (Ti-6-4), for applications that demand relatively high ductility and energy absorption.Demonstrating a combination of lower strength and greater ductility, the alloy introduces a variety ofcost reduction opportunities, including improved machinability. Thermo-mechanical processing andits effects on microstructure and subsequent mechanical performance are characterised, including adetailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strongbehaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependentfatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation andfracture mechanisms responsible for controlling fatigue life are explored. The intimate relationshipbetween thermo-mechanical processing, micro-texture and fatigue crack initiation through thegeneration of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics aredemonstrated, independent of local microstructure.
published_date 2019-11-07T04:04:28Z
_version_ 1763753348011393024
score 11.013619

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