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Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications

Hollie Cockings Orcid Logo, Karen Perkins, Andrew Girling, Jonathan Leggett, Grant Gibson

MATEC Web of Conferences, Volume: 14, Issue: 1

Swansea University Author: Hollie Cockings Orcid Logo

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DOI (Published version): 10.1051/matecconf/20141403001

Abstract

The nickel based superalloy 720Li is employed in the gas turbine due to its mechanical performance at elevated temperature. A comprehensive assessment of the materials behaviour under representative service conditions is reported to address the drive for ever increasing temperatures and more arduous...

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Published in: MATEC Web of Conferences
Published: Giens, Hyeres, France EUROSUPERALLOYS 2014 – 2nd European Symposium on Superalloys and their Applications 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa43667
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first_indexed 2018-09-04T03:58:02Z
last_indexed 2019-07-12T21:22:08Z
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spelling 2019-07-12T14:54:27.9910548 v2 43667 2018-09-03 Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications c951e311ac85396c2bb8ed4153b19fde 0000-0002-9745-4521 Hollie Cockings Hollie Cockings true false 2018-09-03 MTLS The nickel based superalloy 720Li is employed in the gas turbine due to its mechanical performance at elevated temperature. A comprehensive assessment of the materials behaviour under representative service conditions is reported to address the drive for ever increasing temperatures and more arduous environmental exposure. Fatigue experiments have been performed in an air and air/SOx environment at 700 ∘C containing a mixed salt as a contaminant. There is an intimate relationship between local salt level (flux), stress level and stress state, i.e. static or cyclic. The interaction with these variables with the work hardened layer present on the surface of all tested specimens as a result of the shot peening process directly affects the crack initiation process. If specific conditions of environment and stress are achieved, a significant reduction in fatigue life is observed. Conference Paper/Proceeding/Abstract MATEC Web of Conferences 14 1 EUROSUPERALLOYS 2014 – 2nd European Symposium on Superalloys and their Applications Giens, Hyeres, France 18 1 2014 2014-01-18 10.1051/matecconf/20141403001 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-07-12T14:54:27.9910548 2018-09-03T23:05:16.4484698 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Hollie Cockings 0000-0002-9745-4521 1 Karen Perkins 2 Andrew Girling 3 Jonathan Leggett 4 Grant Gibson 5
title Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
spellingShingle Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
Hollie Cockings
title_short Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
title_full Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
title_fullStr Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
title_full_unstemmed Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
title_sort Factors affecting the corrosion fatigue life in nickel based superalloys for disc applications
author_id_str_mv c951e311ac85396c2bb8ed4153b19fde
author_id_fullname_str_mv c951e311ac85396c2bb8ed4153b19fde_***_Hollie Cockings
author Hollie Cockings
author2 Hollie Cockings
Karen Perkins
Andrew Girling
Jonathan Leggett
Grant Gibson
format Conference Paper/Proceeding/Abstract
container_title MATEC Web of Conferences
container_volume 14
container_issue 1
publishDate 2014
institution Swansea University
doi_str_mv 10.1051/matecconf/20141403001
publisher EUROSUPERALLOYS 2014 – 2nd European Symposium on Superalloys and their Applications
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 - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 0
active_str 0
description The nickel based superalloy 720Li is employed in the gas turbine due to its mechanical performance at elevated temperature. A comprehensive assessment of the materials behaviour under representative service conditions is reported to address the drive for ever increasing temperatures and more arduous environmental exposure. Fatigue experiments have been performed in an air and air/SOx environment at 700 ∘C containing a mixed salt as a contaminant. There is an intimate relationship between local salt level (flux), stress level and stress state, i.e. static or cyclic. The interaction with these variables with the work hardened layer present on the surface of all tested specimens as a result of the shot peening process directly affects the crack initiation process. If specific conditions of environment and stress are achieved, a significant reduction in fatigue life is observed.
published_date 2014-01-18T03:54:57Z
_version_ 1763752749826048000
score 11.036006

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