Effect of process parameters on the strength of resistance spot welds in 6082-T6 aluminium alloy

Pereira, A. M.; Ferreira, J. M.; Loureiro, A.; Costa, J. D. M.; Bártolo, P. J.

http://hdl.handle.net/10400.8/14626

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Effect of process parameters on the strength of resistance spot welds in 6082-T6 aluminium alloy.pdf	In this study the microstructural and mechanical behaviour of resistance spot welds (RSW) done on aluminium alloy 6082-T6 sheets, welded at different welding parameters, is examined. Microstructural examinations and hardness evaluations were carried out in order to determine the influence of welding parameters on the quality of the welds. The welded joints were subjected to static tensile-shear tests in order to determine their strength and failure mode. The increase in weld current and duration increased the nugget size and the weld strength. Beyond a critical nugget diameter the failure mode changed from interfacial to pullout. Taking into consideration the sheet thickness and the mechanical properties of the weld, a simple model is proposed to predict the critical nugget diameter required to produce pull-out failure mode in undermatched welds in heat-treatable aluminium alloys.	1.73 MB	Adobe PDF	Download

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Abstract(s)

In this study the microstructural and mechanical behaviour of resistance spot welds (RSW) done on aluminium alloy 6082-T6 sheets, welded at different welding parameters, is examined. Microstructural examinations and hardness evaluations were carried out in order to determine the influence of welding parameters on the quality of the welds. The welded joints were subjected to static tensile-shear tests in order to determine their strength and failure mode. The increase in weld current and duration increased the nugget size and the weld strength. Beyond a critical nugget diameter the failure mode changed from interfacial to pullout. Taking into consideration the sheet thickness and the mechanical properties of the weld, a simple model is proposed to predict the critical nugget diameter required to produce pull-out failure mode in undermatched welds in heat-treatable aluminium alloys.

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Fonte: https://www.researchgate.net/publication/229393827_Effect_of_process_parameters_on_the_strength_of_resistance_spot_welds_in_6082-T6_aluminium_alloy

Keywords

Welding (D) Mechanical properties (E) Failure analysis (H)

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http://hdl.handle.net/10400.8/14626

Citation

A.M. Pereira, J.M. Ferreira, A. Loureiro, J.D.M. Costa, P.J. Bártolo, Effect of process parameters on the strength of resistance spot welds in 6082-T6 aluminium alloy, Materials & Design (1980-2015), Volume 31, Issue 5, 2010, Pages 2454-2463, ISSN 0261-3069, https://doi.org/10.1016/j.matdes.2009.11.052.