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

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

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) 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.

Original languageEnglish
Pages (from-to)2335-2344
Number of pages10
JournalJOM
Volume69
Issue number11
DOIs
Publication statusPublished - 1 Nov 2017

Cite this

Kish, J. R., Birbilis, N., McNally, E. M., Glover, C. F., Zhang, X., McDermid, J. R., & Williams, G. (2017). Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints. JOM, 69(11), 2335-2344. https://doi.org/10.1007/s11837-017-2504-6
Kish, J. R. ; Birbilis, N. ; McNally, E. M. ; Glover, C. F. ; Zhang, X. ; McDermid, J. R. ; Williams, G. / Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints. In: JOM. 2017 ; Vol. 69, No. 11. pp. 2335-2344.
@article{4220e1c7229d490e87e010901f6cc09d,
title = "Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints",
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) 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.",
author = "Kish, {J. R.} and N. Birbilis and McNally, {E. M.} and Glover, {C. F.} and X. Zhang and McDermid, {J. R.} and G. Williams",
year = "2017",
month = "11",
day = "1",
doi = "10.1007/s11837-017-2504-6",
language = "English",
volume = "69",
pages = "2335--2344",
journal = "JOM",
issn = "1047-4838",
publisher = "Springer-Verlag London Ltd.",
number = "11",

}

Kish, JR, Birbilis, N, McNally, EM, Glover, CF, Zhang, X, McDermid, JR & Williams, G 2017, 'Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints', JOM, vol. 69, no. 11, pp. 2335-2344. https://doi.org/10.1007/s11837-017-2504-6

Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints. / Kish, J. R.; Birbilis, N.; McNally, E. M.; Glover, C. F.; Zhang, X.; McDermid, J. R.; Williams, G.

In: JOM, Vol. 69, No. 11, 01.11.2017, p. 2335-2344.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints

AU - Kish, J. R.

AU - Birbilis, N.

AU - McNally, E. M.

AU - Glover, C. F.

AU - Zhang, X.

AU - McDermid, J. R.

AU - Williams, G.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85027115761&partnerID=8YFLogxK

U2 - 10.1007/s11837-017-2504-6

DO - 10.1007/s11837-017-2504-6

M3 - Article

VL - 69

SP - 2335

EP - 2344

JO - JOM

JF - JOM

SN - 1047-4838

IS - 11

ER -

Kish JR, Birbilis N, McNally EM, Glover CF, Zhang X, McDermid JR et al. Corrosion Performance of Friction Stir Linear Lap Welded AM60B Joints. JOM. 2017 Nov 1;69(11):2335-2344. https://doi.org/10.1007/s11837-017-2504-6