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Approaches to fatigue lifing in a high strength polycrystalline nickel alloy

Mark Whittaker Orcid Logo, Nick Barnard, Ben Cockings, Emily Duffy, S.J. Williams, M.C. Hardy

International Journal of Fatigue, Volume: 166, Start page: 107239

Swansea University Authors: Mark Whittaker Orcid Logo, Nick Barnard, Ben Cockings, Emily Duffy

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DOI (Published version): 10.1016/j.ijfatigue.2022.107239

Abstract

The development of high strength alloys with complex chemistries has led to modern nickel disc alloys being produced through a powder metallurgy process which often produces melt anomalies within the material microstructure. The current research investigates the effect of these melt anomalies on ove...

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Published in: International Journal of Fatigue
ISSN: 0142-1123
Published: Elsevier BV 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa61165
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spelling 2022-10-06T12:01:32.0757353 v2 61165 2022-09-09 Approaches to fatigue lifing in a high strength polycrystalline nickel alloy a146c6d442cb2c466d096179f9ac97ca 0000-0002-5854-0726 Mark Whittaker Mark Whittaker true false dc4a58e614bc6a1d99812a3acfdd9034 Nick Barnard Nick Barnard true false 998ffd9fa65fa0c2ffc718a5bff10cdd Ben Cockings Ben Cockings true false 61cd377a4ec57f32de1fbd1491b2d252 Emily Duffy Emily Duffy true false 2022-09-09 MTLS The development of high strength alloys with complex chemistries has led to modern nickel disc alloys being produced through a powder metallurgy process which often produces melt anomalies within the material microstructure. The current research investigates the effect of these melt anomalies on overall lifing approaches for the alloy RR1000, utilised here in its fine grained form. A Walker strain approach is applied to investigate the effect of temperature and R ratio on lifing parameters, and a temperature dependent version of the equation is suggested and used to produce predictions of notched specimen fatigue behaviour. It is found that hard particle inclusions dominate fatigue failures at long fatigue lives whereas failure occurred at the peened surface for shorter fatigue lives. However, lifing approaches were able to provide good fits across the entire data set irrespective of this behaviour change. Journal Article International Journal of Fatigue 166 107239 Elsevier BV 0142-1123 Fatigue; Melt anomaly; Notches; Walker strain 1 1 2023 2023-01-01 10.1016/j.ijfatigue.2022.107239 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University SU Library paid the OA fee (TA Institutional Deal) This work was supported by the UK Technology Strategy Board (SILOET II Project 6 - High Temperature Capability – Compressors and Discs, TP110120). A PhD stipend for Emily Duffy under the EPSRC Rolls-Royce Strategic Partnership in Structural Metallic Systems for Gas Turbines (grants EP/H500383/1 and EP/H022309/1) is also gratefully acknowledged along with funding from Rolls-Royce plc. The input of Dr Mark Evans is also gratefully acknowledged. 2022-10-06T12:01:32.0757353 2022-09-09T14:25:00.5595538 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mark Whittaker 0000-0002-5854-0726 1 Nick Barnard 2 Ben Cockings 3 Emily Duffy 4 S.J. Williams 5 M.C. Hardy 6 61165__25322__ad96332493c34019aa952f0fe3dfe53d.pdf 61165_VoR.pdf 2022-10-06T11:59:52.9889502 Output 4929546 application/pdf Version of Record true © 2022 The Authors. This is an open access article under the CC BY license true eng http://creativecommons.org/licenses/by/4.0/
title Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
spellingShingle Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
Mark Whittaker
Nick Barnard
Ben Cockings
Emily Duffy
title_short Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
title_full Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
title_fullStr Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
title_full_unstemmed Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
title_sort Approaches to fatigue lifing in a high strength polycrystalline nickel alloy
author_id_str_mv a146c6d442cb2c466d096179f9ac97ca
dc4a58e614bc6a1d99812a3acfdd9034
998ffd9fa65fa0c2ffc718a5bff10cdd
61cd377a4ec57f32de1fbd1491b2d252
author_id_fullname_str_mv a146c6d442cb2c466d096179f9ac97ca_***_Mark Whittaker
dc4a58e614bc6a1d99812a3acfdd9034_***_Nick Barnard
998ffd9fa65fa0c2ffc718a5bff10cdd_***_Ben Cockings
61cd377a4ec57f32de1fbd1491b2d252_***_Emily Duffy
author Mark Whittaker
Nick Barnard
Ben Cockings
Emily Duffy
author2 Mark Whittaker
Nick Barnard
Ben Cockings
Emily Duffy
S.J. Williams
M.C. Hardy
format Journal article
container_title International Journal of Fatigue
container_volume 166
container_start_page 107239
publishDate 2023
institution Swansea University
issn 0142-1123
doi_str_mv 10.1016/j.ijfatigue.2022.107239
publisher Elsevier BV
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
document_store_str 1
active_str 0
description The development of high strength alloys with complex chemistries has led to modern nickel disc alloys being produced through a powder metallurgy process which often produces melt anomalies within the material microstructure. The current research investigates the effect of these melt anomalies on overall lifing approaches for the alloy RR1000, utilised here in its fine grained form. A Walker strain approach is applied to investigate the effect of temperature and R ratio on lifing parameters, and a temperature dependent version of the equation is suggested and used to produce predictions of notched specimen fatigue behaviour. It is found that hard particle inclusions dominate fatigue failures at long fatigue lives whereas failure occurred at the peened surface for shorter fatigue lives. However, lifing approaches were able to provide good fits across the entire data set irrespective of this behaviour change.
published_date 2023-01-01T04:19:48Z
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