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Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties

Martin Bache, Costa Coleman, Mark Coleman, Veronica Gray, C. Boettcher

Fatigue & Fracture of Engineering Materials & Structures, Volume: 41, Issue: 11, Pages: 2249 - 2258

Swansea University Authors: Martin Bache, Costa Coleman, Mark Coleman, Veronica Gray

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DOI (Published version): 10.1111/ffe.12814

Abstract

With the drive towards cost‐effective routes for the manufacture of engineering components, flow forming technologies are now under consideration for the production of structural axisymmetric geometries such as tubes and cones. This near net shape process is known to offer improvements in material u...

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Published in: Fatigue & Fracture of Engineering Materials & Structures
ISSN: 8756-758X
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa40092
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last_indexed 2021-01-15T04:02:21Z
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spelling 2021-01-14T13:08:13.4391441 v2 40092 2018-05-10 Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties 3453423659f6bcfddcd0a716c6b0e36a Martin Bache Martin Bache true false cef673956de18ad2eecdd85020bdbbf7 Costa Coleman Costa Coleman true false 73c5735de19c8a70acb41ab788081b67 Mark Coleman Mark Coleman true false 46c41e07e66b7dd7d2d63b26ea0e3450 Veronica Gray Veronica Gray true false 2018-05-10 With the drive towards cost‐effective routes for the manufacture of engineering components, flow forming technologies are now under consideration for the production of structural axisymmetric geometries such as tubes and cones. This near net shape process is known to offer improvements in material utilisation when compared with traditional processes where substantial final machining is required. The microstructure, evolved as a result of the flow forming process together with subsequent heat treatments, will govern associated mechanical properties. Laboratory measurements of the structure‐property relationships of flow formed material can be problematic, mainly because of the restrictions imposed on the extraction of conventional specimen geometries since most of the finished tubular or cone structures will contain thin and curved walls. The development of a suitable specimen design and associated test technique for the measurement of fatigue crack growth rates at room and elevated temperatures is presented. Data obtained from flow formed Inconel 718 (IN 718) will be compared with specimens of the exact same geometry but machined from conventionally forged IN 718 stock. This allowed for validation of the novel flow formed test in addition to an assessment of the damage tolerance of the flow formed variant. The intimate relationship between local microstructure and fracture mechanisms will be described. Journal Article Fatigue & Fracture of Engineering Materials & Structures 41 11 2249 2258 8756-758X crack propagation, nickel‐based alloys, test development, manufacturing 30 11 2018 2018-11-30 10.1111/ffe.12814 COLLEGE NANME COLLEGE CODE Swansea University EPSRC, EP/H500383/1, EP/H022309/1 2021-01-14T13:08:13.4391441 2018-05-10T16:29:45.2938981 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Martin Bache 1 Costa Coleman 2 Mark Coleman 3 Veronica Gray 4 C. Boettcher 5 0040092-10052018163232.pdf bache2018.pdf 2018-05-10T16:32:32.2900000 Output 2160862 application/pdf Version of Record true This is an open access article under the terms of the Creative Commons Attribution License. true eng http://creativecommons.org/licenses/by/4.0/
title Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
spellingShingle Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
Martin Bache
Costa Coleman
Mark Coleman
Veronica Gray
title_short Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
title_full Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
title_fullStr Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
title_full_unstemmed Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
title_sort Microstructure evolution in flow formed IN 718 products and subsequent fatigue crack growth properties
author_id_str_mv 3453423659f6bcfddcd0a716c6b0e36a
cef673956de18ad2eecdd85020bdbbf7
73c5735de19c8a70acb41ab788081b67
46c41e07e66b7dd7d2d63b26ea0e3450
author_id_fullname_str_mv 3453423659f6bcfddcd0a716c6b0e36a_***_Martin Bache
cef673956de18ad2eecdd85020bdbbf7_***_Costa Coleman
73c5735de19c8a70acb41ab788081b67_***_Mark Coleman
46c41e07e66b7dd7d2d63b26ea0e3450_***_Veronica Gray
author Martin Bache
Costa Coleman
Mark Coleman
Veronica Gray
author2 Martin Bache
Costa Coleman
Mark Coleman
Veronica Gray
C. Boettcher
format Journal article
container_title Fatigue & Fracture of Engineering Materials & Structures
container_volume 41
container_issue 11
container_start_page 2249
publishDate 2018
institution Swansea University
issn 8756-758X
doi_str_mv 10.1111/ffe.12814
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 With the drive towards cost‐effective routes for the manufacture of engineering components, flow forming technologies are now under consideration for the production of structural axisymmetric geometries such as tubes and cones. This near net shape process is known to offer improvements in material utilisation when compared with traditional processes where substantial final machining is required. The microstructure, evolved as a result of the flow forming process together with subsequent heat treatments, will govern associated mechanical properties. Laboratory measurements of the structure‐property relationships of flow formed material can be problematic, mainly because of the restrictions imposed on the extraction of conventional specimen geometries since most of the finished tubular or cone structures will contain thin and curved walls. The development of a suitable specimen design and associated test technique for the measurement of fatigue crack growth rates at room and elevated temperatures is presented. Data obtained from flow formed Inconel 718 (IN 718) will be compared with specimens of the exact same geometry but machined from conventionally forged IN 718 stock. This allowed for validation of the novel flow formed test in addition to an assessment of the damage tolerance of the flow formed variant. The intimate relationship between local microstructure and fracture mechanisms will be described.
published_date 2018-11-30T19:33:58Z
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