Low-temperature friction-stir welding of 2024 aluminum

2024 Al alloy has been friction-stir welded at a starting temperature of -30 deg C, and maximum weld zone temperatures did not exceed approx140 deg C (approx410K or 0.4 T sub M , where T sub M is the absolute melting temperature). The residual friction-stir welding (FSW) zone grain structure consist...

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Bibliographic Details
Published in:Scripta materialia 1999-09, Vol.41 (8), p.809-815
Main Authors: Benavides, S, Li, Y, Murr, L.E, Brown, D, McClure, J.C
Format: Article
Language:English
Subjects:
Aluminum Alloys
Applied sciences
Bonding
Exact sciences and technology
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
Microstructure
Recrystallization
Welding
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Summary:2024 Al alloy has been friction-stir welded at a starting temperature of -30 deg C, and maximum weld zone temperatures did not exceed approx140 deg C (approx410K or 0.4 T sub M , where T sub M is the absolute melting temperature). The residual friction-stir welding (FSW) zone grain structure consisted of equiaxed, fine-grains having a uniform size of approx0.8 mu m throughout. This compares with a central weld zone grain size of approx10 mu m in 2024 Al FSW at a starting temperature of 30 deg C, where the weld zone temperature maximum was measured to be 330 deg C (or 0.6 T sub M ).
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(99)00226-2