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High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches

Martin Bache, J. O’Hanlon, D.J. Child, M.C. Hardy

Theoretical and Applied Fracture Mechanics, Volume: 84, Pages: 64 - 71

Swansea University Author: Martin Bache

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Abstract

The low cycle fatigue performance of the nickel based superalloy RR1000 was investigated under a variety of load waveforms at high temperature, employing a double edge notch geometry under load control. Experiments on a plain cylindrical specimen design under strain control were later performed to s...

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Published in: Theoretical and Applied Fracture Mechanics
ISSN: 0167-8442
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa26952
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first_indexed 2016-03-26T02:01:03Z
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spelling 2020-12-09T16:05:37.4289117 v2 26952 2016-03-25 High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches 3453423659f6bcfddcd0a716c6b0e36a Martin Bache Martin Bache true false 2016-03-25 FGSEN The low cycle fatigue performance of the nickel based superalloy RR1000 was investigated under a variety of load waveforms at high temperature, employing a double edge notch geometry under load control. Experiments on a plain cylindrical specimen design under strain control were later performed to simulate the constrained conditions at the root of the notch in order to characterise the interaction between surface constituents and the environment. A significant fatigue debit was demonstrated under both load/strain scenarios when superimposing a dwell period at the minimum point of the cycle. This debit was attributed to a reduction in fatigue crack initiation life resulting from oxidation damage which subsequently cracks under cyclic tension together with a modification to the mean stress through cyclic stabilisation. The same dwell period superimposed at the peak of the cycle was essentially benign for excursions under strain control loading. Journal Article Theoretical and Applied Fracture Mechanics 84 64 71 0167-8442 31 8 2016 2016-08-31 10.1016/j.tafmec.2016.03.007 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University RCUK, EP/H500383/1 2020-12-09T16:05:37.4289117 2016-03-25T20:57:19.5183494 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Martin Bache 1 J. O’Hanlon 2 D.J. Child 3 M.C. Hardy 4 0026952-04102016134415.pdf bache2016(2).pdf 2016-10-04T13:44:15.7070000 Output 2522153 application/pdf Version of Record true 2016-10-04T00:00:00.0000000 This is an open access article under the CC BY license. true eng https://creativecommons.org/licenses/by/4.0/
title High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
spellingShingle High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
Martin Bache
title_short High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
title_full High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
title_fullStr High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
title_full_unstemmed High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
title_sort High temperature fatigue behaviour in an advanced nickel based superalloy: The effects of oxidation and stress relaxation at notches
author_id_str_mv 3453423659f6bcfddcd0a716c6b0e36a
author_id_fullname_str_mv 3453423659f6bcfddcd0a716c6b0e36a_***_Martin Bache
author Martin Bache
author2 Martin Bache
J. O’Hanlon
D.J. Child
M.C. Hardy
format Journal article
container_title Theoretical and Applied Fracture Mechanics
container_volume 84
container_start_page 64
publishDate 2016
institution Swansea University
issn 0167-8442
doi_str_mv 10.1016/j.tafmec.2016.03.007
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 low cycle fatigue performance of the nickel based superalloy RR1000 was investigated under a variety of load waveforms at high temperature, employing a double edge notch geometry under load control. Experiments on a plain cylindrical specimen design under strain control were later performed to simulate the constrained conditions at the root of the notch in order to characterise the interaction between surface constituents and the environment. A significant fatigue debit was demonstrated under both load/strain scenarios when superimposing a dwell period at the minimum point of the cycle. This debit was attributed to a reduction in fatigue crack initiation life resulting from oxidation damage which subsequently cracks under cyclic tension together with a modification to the mean stress through cyclic stabilisation. The same dwell period superimposed at the peak of the cycle was essentially benign for excursions under strain control loading.
published_date 2016-08-31T03:32:32Z
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