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Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy

S.J. Davies, Spencer Jeffs Orcid Logo, Mark Coleman Orcid Logo, Robert Lancaster Orcid Logo

Materials & Design, Volume: 159, Pages: 39 - 46

Swansea University Authors: Spencer Jeffs Orcid Logo, Mark Coleman Orcid Logo, Robert Lancaster Orcid Logo

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Abstract

Nickel-based superalloy C263 has been consolidated with Laser Powder Bed Fusion (LPBF) with two perpendicular build orientations and exposed to either of two heat treatment programmes. This study analyses the effects of build orientation and heat treatment on the resulting microstructures produced i...

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Published in: Materials & Design
ISSN: 0264-1275
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa43528
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spelling 2021-01-14T12:57:56.1200416 v2 43528 2018-08-20 Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy 6ff76d567df079d8bf299990849c3d8f 0000-0002-2819-9651 Spencer Jeffs Spencer Jeffs true false 73c5735de19c8a70acb41ab788081b67 0000-0002-4628-1077 Mark Coleman Mark Coleman true false e1a1b126acd3e4ff734691ec34967f29 0000-0002-1365-6944 Robert Lancaster Robert Lancaster true false 2018-08-20 AERO Nickel-based superalloy C263 has been consolidated with Laser Powder Bed Fusion (LPBF) with two perpendicular build orientations and exposed to either of two heat treatment programmes. This study analyses the effects of build orientation and heat treatment on the resulting microstructures produced in LPBF C263 variants, evaluated against a cast equivalent. Results show that although a strongly anisotropic microstructure was present in standard heat-treated (HT1) LPBF material, this was eradicated following an alternate heat treatment regime (HT2) through recrystallisation, aided by high local strain. Subsequently, their mechanical properties have been assessed by means of the Small Punch (SP) creep test. A contrasting presence of Σ3 formations was observed between the two LPBF heat treatment programmes with the resulting random grain boundary network (RGBN) revealing shorter potential intergranular crack paths in the HT2 material, although grain boundary carbides were found to be the dominant strengthening mechanism for improved creep resistance. Adapted Wilshire equations have been implemented to predict the long-term creep lives of the C263 variants and their apparent activation energies have been determined. Journal Article Materials & Design 159 39 46 0264-1275 Creep, EBSD, Grain boundary connectivity, Laser deposition, Small punch test, Wilshire equations 5 12 2018 2018-12-05 10.1016/j.matdes.2018.08.039 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University EP/H500383/1, EP/H022309/1 UKRI, EPSRC (EP/M028267/1), The European Regional Development Fund through the Welsh Government (80708) and the Ser Solar project via the Welsh Government. 2021-01-14T12:57:56.1200416 2018-08-20T12:56:30.0891268 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering S.J. Davies 1 Spencer Jeffs 0000-0002-2819-9651 2 Mark Coleman 0000-0002-4628-1077 3 Robert Lancaster 0000-0002-1365-6944 4 0043528-04102018101324.pdf APCE016.1-s2.0-S0264127518306543-main.pdf 2018-10-04T10:13:24.3400000 Output 3920096 application/pdf Version of Record true 2018-08-31T00:00:00.0000000 Distributed under the terms of a Creative Commons CC-BY Licence. true eng http://creativecommons.org/licenses/by/4.0/
title Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
spellingShingle Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
Spencer Jeffs
Mark Coleman
Robert Lancaster
title_short Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
title_full Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
title_fullStr Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
title_full_unstemmed Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
title_sort Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy
author_id_str_mv 6ff76d567df079d8bf299990849c3d8f
73c5735de19c8a70acb41ab788081b67
e1a1b126acd3e4ff734691ec34967f29
author_id_fullname_str_mv 6ff76d567df079d8bf299990849c3d8f_***_Spencer Jeffs
73c5735de19c8a70acb41ab788081b67_***_Mark Coleman
e1a1b126acd3e4ff734691ec34967f29_***_Robert Lancaster
author Spencer Jeffs
Mark Coleman
Robert Lancaster
author2 S.J. Davies
Spencer Jeffs
Mark Coleman
Robert Lancaster
format Journal article
container_title Materials & Design
container_volume 159
container_start_page 39
publishDate 2018
institution Swansea University
issn 0264-1275
doi_str_mv 10.1016/j.matdes.2018.08.039
college_str Faculty of Science and Engineering
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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
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description Nickel-based superalloy C263 has been consolidated with Laser Powder Bed Fusion (LPBF) with two perpendicular build orientations and exposed to either of two heat treatment programmes. This study analyses the effects of build orientation and heat treatment on the resulting microstructures produced in LPBF C263 variants, evaluated against a cast equivalent. Results show that although a strongly anisotropic microstructure was present in standard heat-treated (HT1) LPBF material, this was eradicated following an alternate heat treatment regime (HT2) through recrystallisation, aided by high local strain. Subsequently, their mechanical properties have been assessed by means of the Small Punch (SP) creep test. A contrasting presence of Σ3 formations was observed between the two LPBF heat treatment programmes with the resulting random grain boundary network (RGBN) revealing shorter potential intergranular crack paths in the HT2 material, although grain boundary carbides were found to be the dominant strengthening mechanism for improved creep resistance. Adapted Wilshire equations have been implemented to predict the long-term creep lives of the C263 variants and their apparent activation energies have been determined.
published_date 2018-12-05T03:49:24Z
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