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The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging / S. Gardner, W. Li, Mark Coleman, Richard Johnston

Materials Science and Engineering: A, Volume: 668, Pages: 263 - 270

Swansea University Authors: Mark Coleman, Richard Johnston

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Abstract

The effect of thermo-mechanical history on hot compression behaviour and resulting microstructures of a nickel base superalloy is presented. Hot compression tests were carried out on HAYNES® 282® specimens to varying strains from 0.1 to 0.8. Both single pass and multi-pass tests were completed. 60 m...

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Published in: Materials Science and Engineering: A
ISSN: 0921-5093
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa22767
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spelling 2020-07-31T14:23:54.9369346 v2 22767 2015-08-04 The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging 73c5735de19c8a70acb41ab788081b67 0000-0002-4628-1077 Mark Coleman Mark Coleman true false 23282e7acce87dd926b8a62ae410a393 0000-0003-1977-6418 Richard Johnston Richard Johnston true false 2015-08-04 MTLS The effect of thermo-mechanical history on hot compression behaviour and resulting microstructures of a nickel base superalloy is presented. Hot compression tests were carried out on HAYNES® 282® specimens to varying strains from 0.1 to 0.8. Both single pass and multi-pass tests were completed. 60 minute inter-pass times were utilized to accurately replicate industrial forging practices. The effect of dynamic, metadynamic and static recrystallization during inter-pass times on flow stress was investigated. The study showed the presence of yield peaks in the flow stress data which have been identified in previous studies and thought to be due to solute atoms pinning dislocations, but in this work are shown to be due to friction. The resulting microstructures were analysed using scanning electron, optical microscopy and EBSD to relate grain size and homogeneity with flow stress data. The study showed a negligible difference between multi-pass and single pass tests for strain increments above 0.2. Therefore, when modelling similar low strain and strain rate forging processes inHAYNES® 282®, previous forging steps can be ignored. Journal Article Materials Science and Engineering: A 668 263 270 0921-5093 HAYNES® 282®, Interrupted hot compression, Grain growth, Recrystallization, Annealing, 21 6 2016 2016-06-21 10.1016/j.msea.2016.05.051 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University RCUK, EP/H022309/1 2020-07-31T14:23:54.9369346 2015-08-04T11:54:17.9426386 College of Engineering Engineering S. Gardner 1 W. Li 2 Mark Coleman 0000-0002-4628-1077 3 Richard Johnston 0000-0003-1977-6418 4 0022767-02062016100055.pdf GardnerJohnstonMatSciEngAMay2016.pdf 2016-06-02T10:00:55.9430000 Output 4615612 application/pdf Version of Record true 2016-06-02T00:00:00.0000000 Copyright 2016 The Authors. Distributed under the terms of a Creative Commons Attribution 4.0 (CC-BY) Licence. true eng http://creativecommons.org/licenses/by/4.0/
title The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
spellingShingle The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
Mark, Coleman
Richard, Johnston
title_short The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
title_full The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
title_fullStr The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
title_full_unstemmed The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
title_sort The effects of thermomechanical history on the microstructure of a nickel-base superalloy during forging
author_id_str_mv 73c5735de19c8a70acb41ab788081b67
23282e7acce87dd926b8a62ae410a393
author_id_fullname_str_mv 73c5735de19c8a70acb41ab788081b67_***_Mark, Coleman
23282e7acce87dd926b8a62ae410a393_***_Richard, Johnston
author Mark, Coleman
Richard, Johnston
author2 S. Gardner
W. Li
Mark Coleman
Richard Johnston
format Journal article
container_title Materials Science and Engineering: A
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publishDate 2016
institution Swansea University
issn 0921-5093
doi_str_mv 10.1016/j.msea.2016.05.051
college_str College of Engineering
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hierarchy_top_title College of Engineering
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hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
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description The effect of thermo-mechanical history on hot compression behaviour and resulting microstructures of a nickel base superalloy is presented. Hot compression tests were carried out on HAYNES® 282® specimens to varying strains from 0.1 to 0.8. Both single pass and multi-pass tests were completed. 60 minute inter-pass times were utilized to accurately replicate industrial forging practices. The effect of dynamic, metadynamic and static recrystallization during inter-pass times on flow stress was investigated. The study showed the presence of yield peaks in the flow stress data which have been identified in previous studies and thought to be due to solute atoms pinning dislocations, but in this work are shown to be due to friction. The resulting microstructures were analysed using scanning electron, optical microscopy and EBSD to relate grain size and homogeneity with flow stress data. The study showed a negligible difference between multi-pass and single pass tests for strain increments above 0.2. Therefore, when modelling similar low strain and strain rate forging processes inHAYNES® 282®, previous forging steps can be ignored.
published_date 2016-06-21T03:39:57Z
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score 10.8523