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Journal of Materials Engineering and Performance

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01-07-2012

Effect of Water Cooling on the Performances of Friction Stir Welding Heat-Affected Zone

Authors: H. J. Zhang, H. J. Liu, L. Yu

Published in: Journal of Materials Engineering and Performance | Issue 7/2012

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Abstract

The heat-affected zone (HAZ) is generally the intrinsic weakest location of the normal friction stir welded precipitate hardened aluminum alloys. In order to improve the mechanical properties of the HAZ by controlling the temperature level, underwater friction stir welding (FSW) of an Al-Cu aluminum alloy was conducted in the present study. The results indicate that the hardness of the HAZ can be improved through underwater FSW. Microstructural analysis reveals that the hardness improvement is attributed to the lowering of precipitate coarsening level and the narrowing of precipitate free zone, which are essentially induced by the variations of welding thermal cycles under the cooling effect of water.

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Title: Effect of Water Cooling on the Performances of Friction Stir Welding Heat-Affected Zone
Authors: H. J. Zhang
H. J. Liu
L. Yu
Publication date: 01-07-2012
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 7/2012
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-011-0060-8

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