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Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints

J. R. Kish, N. Birbilis, E. M. McNally, C. F. Glover, X. Zhang, J. R. McDermid, G. Williams, Geraint Williams Orcid Logo

JOM

Swansea University Author: Geraint Williams Orcid Logo

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DOI (Published version): 10.1007/s11837-017-2504-6

Abstract

A corrosion investigation of friction stir linear lap welded AM60B joints used to fabricate an Mg alloy-intensive automotive front end sub-assembly was performed. The stir zone exhibited a slightly refined grain size and significant break-up and re-distribution of the divorced Mg17Al12 (β-phase) rel...

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Published in: JOM
ISSN: 1047-4838 1543-1851
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34759
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first_indexed 2017-07-26T20:23:49Z
last_indexed 2018-02-09T05:25:12Z
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spelling 2017-08-22T10:41:29.6708508 v2 34759 2017-07-26 Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2017-07-26 MTLS A corrosion investigation of friction stir linear lap welded AM60B joints used to fabricate an Mg alloy-intensive automotive front end sub-assembly was performed. The stir zone exhibited a slightly refined grain size and significant break-up and re-distribution of the divorced Mg17Al12 (β-phase) relative to the base material. Exposures in NaCl (aq) environments revealed that the stir zone was more susceptible to localized corrosion than the base material. Scanning vibrating electrode technique measurements revealed differential galvanic activity across the joint. Anodic activity was confined to the stir zone surface and involved initiation and lateral propagation of localized filaments. Cathodic activity was initially confined to the base material surface, but was rapidly modified to include the cathodically-activated corrosion products in the filament wake. Site-specific surface analyses revealed that the corrosion observed across the welded joint was likely linked to variations in Al distribution across the surface film/metal interface. Journal Article JOM 1047-4838 1543-1851 31 12 2017 2017-12-31 10.1007/s11837-017-2504-6 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2017-08-22T10:41:29.6708508 2017-07-26T14:57:21.6771076 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering J. R. Kish 1 N. Birbilis 2 E. M. McNally 3 C. F. Glover 4 X. Zhang 5 J. R. McDermid 6 G. Williams 7 Geraint Williams 0000-0002-3399-5142 8 0034759-26072017150103.pdf kish2017.pdf 2017-07-26T15:01:03.1830000 Output 1305538 application/pdf Accepted Manuscript true 2018-08-10T00:00:00.0000000 false eng
title Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
spellingShingle Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
Geraint Williams
title_short Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
title_full Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
title_fullStr Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
title_full_unstemmed Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
title_sort Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Geraint Williams
author2 J. R. Kish
N. Birbilis
E. M. McNally
C. F. Glover
X. Zhang
J. R. McDermid
G. Williams
Geraint Williams
format Journal article
container_title JOM
publishDate 2017
institution Swansea University
issn 1047-4838
1543-1851
doi_str_mv 10.1007/s11837-017-2504-6
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 1
active_str 0
description A corrosion investigation of friction stir linear lap welded AM60B joints used to fabricate an Mg alloy-intensive automotive front end sub-assembly was performed. The stir zone exhibited a slightly refined grain size and significant break-up and re-distribution of the divorced Mg17Al12 (β-phase) relative to the base material. Exposures in NaCl (aq) environments revealed that the stir zone was more susceptible to localized corrosion than the base material. Scanning vibrating electrode technique measurements revealed differential galvanic activity across the joint. Anodic activity was confined to the stir zone surface and involved initiation and lateral propagation of localized filaments. Cathodic activity was initially confined to the base material surface, but was rapidly modified to include the cathodically-activated corrosion products in the filament wake. Site-specific surface analyses revealed that the corrosion observed across the welded joint was likely linked to variations in Al distribution across the surface film/metal interface.
published_date 2017-12-31T03:43:08Z
_version_ 1763752005897027584
score 11.017731

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