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

Bache, Martin; Davies, Helen; Davey, William; Thomas, Matthew; Berment-Parr,

doi:10.3390/met9111200

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

Martin Bache, Helen Davies

, William Davey, Matthew Thomas, Berment-Parr

Metals, Volume: 9, Issue: 11

Swansea University Authors: Martin Bache, Helen Davies

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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 of cost reducti...

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Published in:	Metals
ISSN:	2075-4701 2075-4701
Published:	2019
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa52766
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first_indexed	2019-11-18T13:14:14Z
last_indexed	2021-01-16T04:14:17Z
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spelling	2021-01-15T10:31:03.9451948 v2 52766 2019-11-18 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 2019-11-18 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 of cost reduction opportunities, including improved machinability. Thermo-mechanical processing and its effects on microstructure and subsequent mechanical performance are characterised, including a detailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strong behaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependent fatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation and fracture mechanisms responsible for controlling fatigue life are explored. The intimate relationship between thermo-mechanical processing, micro-texture and fatigue crack initiation through the generation of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics are demonstrated, independent of local microstructure. Journal Article Metals 9 11 2075-4701 2075-4701 Ti-407; dwell sensitive fatigue; quasi-cleavage facets; micro-texture; macro-zones; 7 11 2019 2019-11-07 10.3390/met9111200 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-01-15T10:31:03.9451948 2019-11-18T10:36:36.0983354 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Martin Bache 1 Helen Davies 0000-0003-4838-9572 2 William Davey 3 Matthew Thomas 4 Berment-Parr 5 52766__15907__d023717096184e48bc506a8f893ec894.pdf bache2019.pdf 2019-11-18T10:38:57.7909407 Output 10860871 application/pdf Version of Record true 2019-11-18T00:00:00.0000000 This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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
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
author_id_fullname_str_mv	3453423659f6bcfddcd0a716c6b0e36a_*_Martin Bache a5277aa17f0f10a481da9e9751ccaeef_*_Helen Davies
author	Martin Bache Helen Davies
author2	Martin Bache Helen Davies William Davey Matthew Thomas Berment-Parr
format	Journal article
container_title	Metals
container_volume	9
container_issue	11
publishDate	2019
institution	Swansea University
issn	2075-4701 2075-4701
doi_str_mv	10.3390/met9111200
college_str	Faculty of Science and Engineering
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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 - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str	1
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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 of cost reduction opportunities, including improved machinability. Thermo-mechanical processing and its effects on microstructure and subsequent mechanical performance are characterised, including a detailed assessment of the fatigue and crack propagation properties. Demonstrating relatively strong behaviour under high-cycle fatigue loading, Ti-407 is nevertheless susceptible to time-dependent fatigue effects. Its sensitivity to dwell loading is quantified, and the associated deformation and fracture mechanisms responsible for controlling fatigue life are explored. The intimate relationship between thermo-mechanical processing, micro-texture and fatigue crack initiation through the generation of quasi-cleavage facets is highlighted. Consistent fatigue crack growth kinetics are demonstrated, independent of local microstructure.
published_date	2019-11-07T04:05:19Z
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score	11.037581

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

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