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


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, 276-284.

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Description/Abstract

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.

Item Type: Article
ISSNs: 0267-0836 (print)
Related URLs:
Keywords: friction stir weld, Al-Cu-Mg, co-clusters, precipitate, DSC, EBSD, hardness, fatigue
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 41408
Date Deposited: 07 Sep 2006
Last Modified: 15 Aug 2014 08:25
URI: http://eprints.soton.ac.uk/id/eprint/41408

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