Anodisation of friction stir welds in AA 5052-O alloy

T. S. Shih; Y. J. Jhou; J. W. Wang; L. R. Hwang

doi:10.1179/136217110X12785889549741

Anodisation of friction stir welds in AA 5052-O alloy

T. S. Shih, Y. J. Jhou, J. W. Wang, L. R. Hwang

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

An AA 5052-O alloy was used as the base metal for friction stir welding (FSW). The heat and maximum temperature developed in the matrix of the sample during FSW were computed. Optical observations showed grey strips that appeared on the surface of the sample after anodisation. These grey strips could be attributed to the emergence of a thermo mechanically affected zone (TMAZ) from the bulk friction stir welded sample. Mg solubility in the TMAZ increased when Mg₂Si particles that inherently existed in the matrix of the AA 5052-O alloy dissolved after being subjected to the maximum temperature. In addition, the TMAZ was also subjected to shear stress. Plastic deformation increased the dislocation density. The combined effects of the increased dislocation density and enriched Mg content led to a change in the corrosion resistance and anodic behavior of this zone.

Original language	English
Pages (from-to)	385-391
Number of pages	7
Journal	Science and Technology of Welding and Joining
Volume	16
Issue number	5
DOIs	https://doi.org/10.1179/136217110X12785889549741
State	Published - Jul 2011

Keywords

AA 5052 alloy
Anodisation
Friction stir weld

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10.1179/136217110X12785889549741

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abstract = "An AA 5052-O alloy was used as the base metal for friction stir welding (FSW). The heat and maximum temperature developed in the matrix of the sample during FSW were computed. Optical observations showed grey strips that appeared on the surface of the sample after anodisation. These grey strips could be attributed to the emergence of a thermo mechanically affected zone (TMAZ) from the bulk friction stir welded sample. Mg solubility in the TMAZ increased when Mg2Si particles that inherently existed in the matrix of the AA 5052-O alloy dissolved after being subjected to the maximum temperature. In addition, the TMAZ was also subjected to shear stress. Plastic deformation increased the dislocation density. The combined effects of the increased dislocation density and enriched Mg content led to a change in the corrosion resistance and anodic behavior of this zone.",

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AU - Shih, T. S.

AU - Jhou, Y. J.

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N2 - An AA 5052-O alloy was used as the base metal for friction stir welding (FSW). The heat and maximum temperature developed in the matrix of the sample during FSW were computed. Optical observations showed grey strips that appeared on the surface of the sample after anodisation. These grey strips could be attributed to the emergence of a thermo mechanically affected zone (TMAZ) from the bulk friction stir welded sample. Mg solubility in the TMAZ increased when Mg2Si particles that inherently existed in the matrix of the AA 5052-O alloy dissolved after being subjected to the maximum temperature. In addition, the TMAZ was also subjected to shear stress. Plastic deformation increased the dislocation density. The combined effects of the increased dislocation density and enriched Mg content led to a change in the corrosion resistance and anodic behavior of this zone.

AB - An AA 5052-O alloy was used as the base metal for friction stir welding (FSW). The heat and maximum temperature developed in the matrix of the sample during FSW were computed. Optical observations showed grey strips that appeared on the surface of the sample after anodisation. These grey strips could be attributed to the emergence of a thermo mechanically affected zone (TMAZ) from the bulk friction stir welded sample. Mg solubility in the TMAZ increased when Mg2Si particles that inherently existed in the matrix of the AA 5052-O alloy dissolved after being subjected to the maximum temperature. In addition, the TMAZ was also subjected to shear stress. Plastic deformation increased the dislocation density. The combined effects of the increased dislocation density and enriched Mg content led to a change in the corrosion resistance and anodic behavior of this zone.

KW - AA 5052 alloy

KW - Anodisation

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Anodisation of friction stir welds in AA 5052-O alloy

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