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The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent

Mark Evans

International Journal of Pressure Vessels and Piping, Volume: 214, Start page: 105418

Swansea University Author: Mark Evans

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DOI (Published version): 10.1016/j.ijpvp.2024.105418

Abstract

It is important to be able to predict the creep life of materials used in power plants and aeroengines. This paper illustrates the role played by a materials tensile strength in achieving this. It also shows that published high temperature tensile strength values are not always suitable for use in c...

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Published in: International Journal of Pressure Vessels and Piping
ISSN: 0308-0161 1879-3541
Published: Elsevier BV 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa68630
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spelling 2025-02-07T15:25:57.7092917 v2 68630 2025-01-02 The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent 7720f04c308cf7a1c32312058780d20c Mark Evans Mark Evans true false 2025-01-02 It is important to be able to predict the creep life of materials used in power plants and aeroengines. This paper illustrates the role played by a materials tensile strength in achieving this. It also shows that published high temperature tensile strength values are not always suitable for use in certain creep models due to its strain rate dependency. Using strain rates larger than those used by NIMS (0.00125/s) resulted in more sensible estimates of the activation energy for creep. Using these larger strain rates also resulted in an improved fit of these models to the experimental data. Using a strain rate of 0.0133/s instead of 0.00125/s also lead to substantial reduction in the proportion of any prediction error that was random in nature. When using a strain rate of 0.0133/s, good predictions of life out to 130,000 h can be made from data with a maximum life of 1230 h. Journal Article International Journal of Pressure Vessels and Piping 214 105418 Elsevier BV 0308-0161 1879-3541 S shaped curve creep models; Strain rate; Creep testing; Tensile testing 1 4 2025 2025-04-01 10.1016/j.ijpvp.2024.105418 COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) This research was not funded by research council grants or private sponsors and as such there are no financial relationships to declare. 2025-02-07T15:25:57.7092917 2025-01-02T09:42:25.8564421 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mark Evans 1 68630__33225__3b3a0bc6faf04bbb8ea494122849ccbe.pdf 68630.pdf 2025-01-02T09:44:52.1957707 Output 934545 application/pdf Version of Record true © 2024 The Author(s). This is an open access article under the CC BY-NC-ND license. true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
spellingShingle The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
Mark Evans
title_short The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
title_full The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
title_fullStr The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
title_full_unstemmed The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
title_sort The reliability of S shaped curve creep models when the high temperature tensile strength is strain rate dependent
author_id_str_mv 7720f04c308cf7a1c32312058780d20c
author_id_fullname_str_mv 7720f04c308cf7a1c32312058780d20c_***_Mark Evans
author Mark Evans
author2 Mark Evans
format Journal article
container_title International Journal of Pressure Vessels and Piping
container_volume 214
container_start_page 105418
publishDate 2025
institution Swansea University
issn 0308-0161
1879-3541
doi_str_mv 10.1016/j.ijpvp.2024.105418
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 It is important to be able to predict the creep life of materials used in power plants and aeroengines. This paper illustrates the role played by a materials tensile strength in achieving this. It also shows that published high temperature tensile strength values are not always suitable for use in certain creep models due to its strain rate dependency. Using strain rates larger than those used by NIMS (0.00125/s) resulted in more sensible estimates of the activation energy for creep. Using these larger strain rates also resulted in an improved fit of these models to the experimental data. Using a strain rate of 0.0133/s instead of 0.00125/s also lead to substantial reduction in the proportion of any prediction error that was random in nature. When using a strain rate of 0.0133/s, good predictions of life out to 130,000 h can be made from data with a maximum life of 1230 h.
published_date 2025-04-01T05:24:48Z
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score 11.089572

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