Fatigue of friction stir welded 2024-T351 aluminium alloy


Booth, D. and Sinclair, I. (2002) Fatigue of friction stir welded 2024-T351 aluminium alloy. In, Gregson, P.J. and Harris, S. (eds.) Aluminium Alloys 2002: Their Physical and Mechanical Properties. 8th International Conference ICAA8 Switzerland, Trans Tech, 1671-1676. (Materials Science Forum 396-402).

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Description/Abstract

Fatigue failure characteristics of friction stir welds in 13mm gauge 2024-T351 plate have been assessed. Failure occurred from either the weld region (nugget/flow arm) or from the material immediately surrounding the weld. Fatigue failure from the surrounding material was essentially conventional, initiating from large S-phase intermetallic particles and growing in a macroscopic mode I manner. Corresponding fatigue lives were seen to be comparable to parent plate and results previously reported for similar welds in thinner plate. Failure over the weld region was identified with discontinuities in the macroscopic flow pattern of the weld flow arm. Subsequent crack growth showed pronounced macroscopic crack deflection around the ‘onion ring’ structure of the weld nugget. The bands making up the onion rings were identified with variations in local hardness levels, consistent with a mechanical contribution to the crack deflection process.

Item Type: Book Section
Additional Information: Series ISSN 0255-5476
ISBNs: 0878498990 (hardback)
Related URLs:
Keywords: friction stir welding, fatigue, 2024, initiation, propagation
Subjects: T Technology > TN Mining engineering. Metallurgy
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 22231
Date Deposited: 22 Mar 2006
Last Modified: 27 Mar 2014 18:11
URI: http://eprints.soton.ac.uk/id/eprint/22231

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