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The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel

Mark Evans

International Journal of Pressure Vessels and Piping, Volume: 218, Issue: Part B, Start page: 105627

Swansea University Author: Mark Evans

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DOI (Published version): 10.1016/j.ijpvp.2025.105627

Abstract

It is important to be able to predict the life of materials at high temperatures and the Monkman-Grant relation offers potential for reducing the development cycle for new materials. This paper uses the 4-θ methodology to i. identify and explain the form of this relation in terms of creep mechanisms...

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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/cronfa70218
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spelling 2025-10-07T16:17:46.0590019 v2 70218 2025-08-22 The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel 7720f04c308cf7a1c32312058780d20c Mark Evans Mark Evans true false 2025-08-22 It is important to be able to predict the life of materials at high temperatures and the Monkman-Grant relation offers potential for reducing the development cycle for new materials. This paper uses the 4-θ methodology to i. identify and explain the form of this relation in terms of creep mechanisms and ii. to discover whether this form was compatible with development cycle reduction. The Monkman-Grant proportionality constant (M2) was found to fall into three groupings depending on the amount of damage and the rate at which this occurred. Only once this was considered did the exponent on the secondary creep rate equal -1 - as predicted by 4-θ methodology. Only once such a grouping is undertaken does the relation accurately predicted lives close to operating conditions. Journal Article International Journal of Pressure Vessels and Piping 218 Part B 105627 Elsevier BV 0308-0161 1879-3541 Low chrome steels; Monkman-Grant relation; 4-θ methodology; Damage; Rates of damage accumulation; Recovery; Hardening 1 12 2025 2025-12-01 10.1016/j.ijpvp.2025.105627 COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) Swansea University 2025-10-07T16:17:46.0590019 2025-08-22T11:47:43.6287018 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mark Evans 1 70218__35279__a4de702bd2a14a3892869d9a6cd54145.pdf 70218.VOR.pdf 2025-10-07T16:10:24.8802841 Output 4617040 application/pdf Version of Record true © 2025 The Author. 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 role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
spellingShingle The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
Mark Evans
title_short The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
title_full The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
title_fullStr The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
title_full_unstemmed The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
title_sort The role of primary and tertiary creep in defining the form of the Monkman-Grant relation using the 4-θ methodology: An application to a 1CrMoV rotor steel
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 218
container_issue Part B
container_start_page 105627
publishDate 2025
institution Swansea University
issn 0308-0161
1879-3541
doi_str_mv 10.1016/j.ijpvp.2025.105627
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 life of materials at high temperatures and the Monkman-Grant relation offers potential for reducing the development cycle for new materials. This paper uses the 4-θ methodology to i. identify and explain the form of this relation in terms of creep mechanisms and ii. to discover whether this form was compatible with development cycle reduction. The Monkman-Grant proportionality constant (M2) was found to fall into three groupings depending on the amount of damage and the rate at which this occurred. Only once this was considered did the exponent on the secondary creep rate equal -1 - as predicted by 4-θ methodology. Only once such a grouping is undertaken does the relation accurately predicted lives close to operating conditions.
published_date 2025-12-01T05:30:18Z
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score 11.444473

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