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Analysis of local microstructure and hardness of 13mm gauge 2024-T351 AA friction stir welds

Record type: Article

The friction stir welding process has been used to join 13mm gauge 2024-T351 aluminium alloy plates together. A detailed microstructural study of the resulting weld was carried out using Differential Scanning Calorimetry (DSC), hardness testing, Scanning Electron Microscopy (SEM) and Electron Backscatter Diffraction (EBSD). DSC was used to explain the hardness results at a number of regions across the weld in terms of co-cluster dissolution and reformation and S phase formation, coarsening and dissolution. The “onion rings” structure found in the nugget weld was shown to be the result of a combination of the slight grain size variations and a change in nature and size of the particles present (i.e. intragranular versus intergranular). The variation in corrosion properties and hardness of the rings is discussed in terms of the local microstructure and quench sensitivities.

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Citation

Booth, D.P.P., Starink, M.J. and Sinclair, I. (2007) Analysis of local microstructure and hardness of 13mm gauge 2024-T351 AA friction stir welds Materials Science and Technology, 23, pp. 276-284.

More information

Published date: 2007
Keywords: friction stir weld, Al-Cu-Mg, co-clusters, precipitate, DSC, EBSD, hardness, fatigue
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 41408
URI: http://eprints.soton.ac.uk/id/eprint/41408
ISSN: 0267-0836
PURE UUID: e34e7859-a665-4db2-b8e8-3d58683f8bd6

Catalogue record

Date deposited: 07 Sep 2006
Last modified: 17 Jul 2017 15:30

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