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The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282

John Boswell, Jonathan Jones, Nick Barnard, Daniel Clark, Mark Whittaker Orcid Logo, Robert Lancaster Orcid Logo

Materials & Design, Volume: 205, Start page: 109725

Swansea University Authors: Jonathan Jones, Nick Barnard, Mark Whittaker Orcid Logo, Robert Lancaster Orcid Logo

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DOI (Published version): 10.1016/j.matdes.2021.109725

Abstract

The nickel-based superalloy Haynes 282 is a promising candidate material among the existing batch of aerospace alloys for manufacture via laser powder bed fusion (LPBF). LPBF Haynes 282 has a strong preference for epitaxial grain growth in the (0 0 1) orientation, promoting inhomogeneous grain morph...

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Published in: Materials & Design
ISSN: 0264-1275
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56697
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LPBF Haynes 282 has a strong preference for epitaxial grain growth in the (0 0 1) orientation, promoting inhomogeneous grain morphologies and anisotropic mechanical behaviour. In this paper, LPBF Haynes 282 specimens have been extracted from perpendicular and parallel orientations in respect to the primary vertical build direction and studied in their original as-built form and when exposed to a solution and age heat treatment. The effect of alternative energy densities is also considered in the different conditions. Results show that the numerous processing variables discussed in this research have a direct influence on the morphology of the final grain structure. Although a strongly anisotropic microstructure was present in the as-built material in both respective orientations, this behaviour was eradicated following the solution and aging heat treatment through recrystallisation, and the alleviation of local texture and misorientation to help produce a more uniform equiaxed grain morphology. 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spelling 2021-12-01T14:05:45.9748840 v2 56697 2021-04-19 The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282 f8a9f680a0a4af8456672e5684e531c8 Jonathan Jones Jonathan Jones true false dc4a58e614bc6a1d99812a3acfdd9034 Nick Barnard Nick Barnard true false a146c6d442cb2c466d096179f9ac97ca 0000-0002-5854-0726 Mark Whittaker Mark Whittaker true false e1a1b126acd3e4ff734691ec34967f29 0000-0002-1365-6944 Robert Lancaster Robert Lancaster true false 2021-04-19 FGMHL The nickel-based superalloy Haynes 282 is a promising candidate material among the existing batch of aerospace alloys for manufacture via laser powder bed fusion (LPBF). LPBF Haynes 282 has a strong preference for epitaxial grain growth in the (0 0 1) orientation, promoting inhomogeneous grain morphologies and anisotropic mechanical behaviour. In this paper, LPBF Haynes 282 specimens have been extracted from perpendicular and parallel orientations in respect to the primary vertical build direction and studied in their original as-built form and when exposed to a solution and age heat treatment. The effect of alternative energy densities is also considered in the different conditions. Results show that the numerous processing variables discussed in this research have a direct influence on the morphology of the final grain structure. Although a strongly anisotropic microstructure was present in the as-built material in both respective orientations, this behaviour was eradicated following the solution and aging heat treatment through recrystallisation, and the alleviation of local texture and misorientation to help produce a more uniform equiaxed grain morphology. The subsequent mechanical behaviour has been assessed through hardness, tensile and creep stress rupture testing, and results have corroborated the microstructural findings to confirm a more isotropic material was successfully achieved. Journal Article Materials & Design 205 109725 Elsevier BV 0264-1275 Nickel base superalloys, Laser powder bed fusion, Energy density, Microstructure, Mechanical properties 1 7 2021 2021-07-01 10.1016/j.matdes.2021.109725 COLLEGE NANME Medicine, Health and Life Science - Faculty COLLEGE CODE FGMHL Swansea University 2021-12-01T14:05:45.9748840 2021-04-19T15:53:22.9486774 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised John Boswell 1 Jonathan Jones 2 Nick Barnard 3 Daniel Clark 4 Mark Whittaker 0000-0002-5854-0726 5 Robert Lancaster 0000-0002-1365-6944 6 56697__19691__1a8824dc60b04bfdb61e6cf0dca59cda.pdf 56697.pdf 2021-04-19T16:02:06.7665461 Output 7087603 application/pdf Version of Record true ©2021 The Author(s). This is an open access article under the CC BY license true eng http://creativecommons.org/licenses/by/4.0/
title The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
spellingShingle The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
Jonathan Jones
Nick Barnard
Mark Whittaker
Robert Lancaster
title_short The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
title_full The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
title_fullStr The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
title_full_unstemmed The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
title_sort The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282
author_id_str_mv f8a9f680a0a4af8456672e5684e531c8
dc4a58e614bc6a1d99812a3acfdd9034
a146c6d442cb2c466d096179f9ac97ca
e1a1b126acd3e4ff734691ec34967f29
author_id_fullname_str_mv f8a9f680a0a4af8456672e5684e531c8_***_Jonathan Jones
dc4a58e614bc6a1d99812a3acfdd9034_***_Nick Barnard
a146c6d442cb2c466d096179f9ac97ca_***_Mark Whittaker
e1a1b126acd3e4ff734691ec34967f29_***_Robert Lancaster
author Jonathan Jones
Nick Barnard
Mark Whittaker
Robert Lancaster
author2 John Boswell
Jonathan Jones
Nick Barnard
Daniel Clark
Mark Whittaker
Robert Lancaster
format Journal article
container_title Materials & Design
container_volume 205
container_start_page 109725
publishDate 2021
institution Swansea University
issn 0264-1275
doi_str_mv 10.1016/j.matdes.2021.109725
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 - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description The nickel-based superalloy Haynes 282 is a promising candidate material among the existing batch of aerospace alloys for manufacture via laser powder bed fusion (LPBF). LPBF Haynes 282 has a strong preference for epitaxial grain growth in the (0 0 1) orientation, promoting inhomogeneous grain morphologies and anisotropic mechanical behaviour. In this paper, LPBF Haynes 282 specimens have been extracted from perpendicular and parallel orientations in respect to the primary vertical build direction and studied in their original as-built form and when exposed to a solution and age heat treatment. The effect of alternative energy densities is also considered in the different conditions. Results show that the numerous processing variables discussed in this research have a direct influence on the morphology of the final grain structure. Although a strongly anisotropic microstructure was present in the as-built material in both respective orientations, this behaviour was eradicated following the solution and aging heat treatment through recrystallisation, and the alleviation of local texture and misorientation to help produce a more uniform equiaxed grain morphology. The subsequent mechanical behaviour has been assessed through hardness, tensile and creep stress rupture testing, and results have corroborated the microstructural findings to confirm a more isotropic material was successfully achieved.
published_date 2021-07-01T04:11:51Z
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score 11.012924

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