Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 20, Issue 10, Pages 1226-1232Publisher
MANEY PUBLISHING
DOI: 10.1179/026708304225022313
Keywords
resistance spot welding; aluminium alloys; electrode pitting and degradation; experimental simulation; weld nugget size; joint strength
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A novel experimental technique, using specially designed electrodes (with machined annular and circular pits, and central cavities), was developed to simulate the effects of pitting morphology of the electrode tip face on weld nugget size and joint strength in resistance spot welding of aluminium alloys. Results of the experimental simulations indicate that the distribution of electrode contact areas and their alignment between top and bottom electrodes both affect weld quality. A complete understanding of the correlation between tip face features and weld nugget formation would require three-dimensional numerical modelling; this work has provided well organised experimental data in support of future modelling work.
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