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The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy

Hollie Cockings Orcid Logo, Ben Cockings, Will Harrison Orcid Logo, Mike Dowd, Karen Perkins Orcid Logo, Mark Whittaker Orcid Logo, G.J. Gibson

Journal of Alloys and Compounds, Volume: 832

Swansea University Authors: Hollie Cockings Orcid Logo, Ben Cockings , Will Harrison Orcid Logo, Mike Dowd , Karen Perkins Orcid Logo, Mark Whittaker Orcid Logo

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Abstract

Surface treatments such as shot peening to inhibit fatigue crack initiation are essential processes when designing gas turbine components for aerospace applications. It is therefore crucial to understand the effects of shot peening in representative service environments. Here, the influence of surfa...

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Published in: Journal of Alloys and Compounds
ISSN: 0925-8388
Published: 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53920
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It is therefore crucial to understand the effects of shot peening in representative service environments. Here, the influence of surface treatment on the high temperature corrosion fatigue response of a polycrystalline nickel-based superalloy is considered, an area that has not previously been explored. Two shot peening conditions; 110H 7A 200% and 330H 7A 200%, along with a polished surface were chosen. Specimens were salted and exposed to SO2 gas during fatigue testing at 700&#x202F;&#xB0;C. A range of novel techniques including SEM, EBSD and axial chromatism profilometry were used to analyse the near surface cold work and surface condition before and after testing. EBSD local misorientation maps, paired with an increase in corrosion-fatigue life, suggest that a greater depth of cold work produced by the smaller shot size (110H), is providing a significant benefit in terms of hot corrosion and corrosion-fatigue performance. This paper concludes that the presence of a substantial layer of cold work is required to account for any metal loss due to the effects of hot corrosion. 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spelling 2021-01-15T10:36:24.5176412 v2 53920 2020-04-09 The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy c951e311ac85396c2bb8ed4153b19fde 0000-0002-9745-4521 Hollie Cockings Hollie Cockings true false 998ffd9fa65fa0c2ffc718a5bff10cdd Ben Cockings Ben Cockings true false dae59f76fa4f63123aa028abfcd2b07a 0000-0002-0380-7075 Will Harrison Will Harrison true false 5ed34863b06d600da4be113c1c83a35c Mike Dowd Mike Dowd true false f866eaa2d8f163d2b4e99259966427c8 0000-0001-5826-9705 Karen Perkins Karen Perkins true false a146c6d442cb2c466d096179f9ac97ca 0000-0002-5854-0726 Mark Whittaker Mark Whittaker true false 2020-04-09 MECH Surface treatments such as shot peening to inhibit fatigue crack initiation are essential processes when designing gas turbine components for aerospace applications. It is therefore crucial to understand the effects of shot peening in representative service environments. Here, the influence of surface treatment on the high temperature corrosion fatigue response of a polycrystalline nickel-based superalloy is considered, an area that has not previously been explored. Two shot peening conditions; 110H 7A 200% and 330H 7A 200%, along with a polished surface were chosen. Specimens were salted and exposed to SO2 gas during fatigue testing at 700 °C. A range of novel techniques including SEM, EBSD and axial chromatism profilometry were used to analyse the near surface cold work and surface condition before and after testing. EBSD local misorientation maps, paired with an increase in corrosion-fatigue life, suggest that a greater depth of cold work produced by the smaller shot size (110H), is providing a significant benefit in terms of hot corrosion and corrosion-fatigue performance. This paper concludes that the presence of a substantial layer of cold work is required to account for any metal loss due to the effects of hot corrosion. It is also evident that cold work hinders fatigue crack initiation and delays the onset of pit to crack transition. Journal Article Journal of Alloys and Compounds 832 0925-8388 High-temperature alloys, Surfaces and interfaces, Corrosion, Oxidation, Microstructure, Mechanical properties 15 8 2020 2020-08-15 10.1016/j.jallcom.2020.154889 https://www.sciencedirect.com/science/article/abs/pii/S0925838820312524?via%3Dihub COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2021-01-15T10:36:24.5176412 2020-04-09T08:41:13.2264539 College of Engineering Engineering Hollie Cockings 0000-0002-9745-4521 1 Ben Cockings 2 Will Harrison 0000-0002-0380-7075 3 Mike Dowd 4 Karen Perkins 0000-0001-5826-9705 5 Mark Whittaker 0000-0002-5854-0726 6 G.J. Gibson 7 53920__17032__fafa0db1c4b04cff91d8d6e82ca5d751.pdf 53920.pdf 2020-04-09T08:44:19.7154760 Output 5755639 application/pdf Accepted Manuscript true 2021-04-06T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. false eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
spellingShingle The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
Hollie, Cockings
Ben, Cockings
Will, Harrison
Mike, Dowd
Karen, Perkins
Mark, Whittaker
title_short The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
title_full The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
title_fullStr The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
title_full_unstemmed The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
title_sort The effect of near-surface plastic deformation on the hot corrosion and high temperature corrosion-fatigue response of a nickel-based superalloy
author_id_str_mv c951e311ac85396c2bb8ed4153b19fde
998ffd9fa65fa0c2ffc718a5bff10cdd
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f866eaa2d8f163d2b4e99259966427c8
a146c6d442cb2c466d096179f9ac97ca
author_id_fullname_str_mv c951e311ac85396c2bb8ed4153b19fde_***_Hollie, Cockings_***_0000-0002-9745-4521
998ffd9fa65fa0c2ffc718a5bff10cdd_***_Ben, Cockings_***_
dae59f76fa4f63123aa028abfcd2b07a_***_Will, Harrison_***_0000-0002-0380-7075
5ed34863b06d600da4be113c1c83a35c_***_Mike, Dowd_***_
f866eaa2d8f163d2b4e99259966427c8_***_Karen, Perkins_***_0000-0001-5826-9705
a146c6d442cb2c466d096179f9ac97ca_***_Mark, Whittaker_***_0000-0002-5854-0726
author Hollie, Cockings
Ben, Cockings
Will, Harrison
Mike, Dowd
Karen, Perkins
Mark, Whittaker
author2 Hollie Cockings
Ben Cockings
Will Harrison
Mike Dowd
Karen Perkins
Mark Whittaker
G.J. Gibson
format Journal article
container_title Journal of Alloys and Compounds
container_volume 832
publishDate 2020
institution Swansea University
issn 0925-8388
doi_str_mv 10.1016/j.jallcom.2020.154889
college_str College of Engineering
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hierarchy_top_id collegeofengineering
hierarchy_top_title College of Engineering
hierarchy_parent_id collegeofengineering
hierarchy_parent_title College of Engineering
department_str Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering
url https://www.sciencedirect.com/science/article/abs/pii/S0925838820312524?via%3Dihub
document_store_str 1
active_str 0
description Surface treatments such as shot peening to inhibit fatigue crack initiation are essential processes when designing gas turbine components for aerospace applications. It is therefore crucial to understand the effects of shot peening in representative service environments. Here, the influence of surface treatment on the high temperature corrosion fatigue response of a polycrystalline nickel-based superalloy is considered, an area that has not previously been explored. Two shot peening conditions; 110H 7A 200% and 330H 7A 200%, along with a polished surface were chosen. Specimens were salted and exposed to SO2 gas during fatigue testing at 700 °C. A range of novel techniques including SEM, EBSD and axial chromatism profilometry were used to analyse the near surface cold work and surface condition before and after testing. EBSD local misorientation maps, paired with an increase in corrosion-fatigue life, suggest that a greater depth of cold work produced by the smaller shot size (110H), is providing a significant benefit in terms of hot corrosion and corrosion-fatigue performance. This paper concludes that the presence of a substantial layer of cold work is required to account for any metal loss due to the effects of hot corrosion. It is also evident that cold work hinders fatigue crack initiation and delays the onset of pit to crack transition.
published_date 2020-08-15T04:19:05Z
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