A model for local proof strength of 2xxx welds


Starink, M.J., Wang, S.C. and Sinclair, I. (2005) A model for local proof strength of 2xxx welds. In, Jata, Kumar J., Mahoney, M.W. and Mishra, R.S. (eds.) Friction stir welding and processing III. 2005 TMS Annual Meeting , The Minerals, Metals & Materials Society, 223-243.

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Description/Abstract

The microstructure development and resulting hardness and yield strength profiles of Al 2xxx welds are modelled via a combined analysis of primary precipitation, coarsening, resolution, partial/full melting and resolidification and re-precipitation. Local strengthening is dominated by two types of precipitates: the Cu-Mg clusters (or zones) which form at low temperature and dissolve at temperatures above about 230ºC, and the S phase which dominates the reaction at both the maximum and minimum strength locations. The model is compared to microstructural and hardness data from friction stir welded 2024. The combined heat flow-microstructure-strengthening models show hardness predictions that are in line with experimental observations of local hardness variations close to the weld centre line, and different situations of local minima and maxima are reproduced.

Item Type: Book Section
ISBNs: 0873395840 (hardback)
Related URLs:
Keywords: friction stir weld, strength, hardness, coarsening, precipitation, clusters, HAZ, heat affected zone, local melting
Subjects: T Technology > T Technology (General)
T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 23207
Date Deposited: 31 Mar 2006
Last Modified: 15 Aug 2014 08:43
URI: http://eprints.soton.ac.uk/id/eprint/23207

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