Title

PARAMETERS OPTIMIZATION ON FRICTION SPOT WELDING OF AA5754 ALUMINIUM ALLOY

PARAMETERS OPTIMIZATION ON FRICTION SPOT WELDING OF AA5754 ALUMINIUM ALLOY

Authorship

Piccolo, Debora Regina Gastaldi; Suhuddin, Uceu; Santos, Jorge Fernandes dos; Alcântara, Nelson Guedes de

Piccolo, Debora Regina Gastaldi

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Suhuddin, Uceu

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Santos, Jorge Fernandes dos

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Alcântara, Nelson Guedes de

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DOI

10.5151/2594-5327-23208

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Abstract

The solid-state joining technique, Friction Spot Welding (FSpW), is able to produce spot-like joints in distinct sort of materials, especially in lightweight alloys, being an important solution to reduce the structural weight in the transport sector, and thus, minimize the fuel consumption. Some characteristics that make the FSpW advantageous are defect-free joints produced with high strength, high energy efficiency, reduction in the number of process steps, no post processing required due to high surface quality, high welding speeds and high environmental compatibility. The study of FSpW parameters and their influence on lap shear strength of AA5754 aluminium alloy welds were described in the present work. The optimization of welded parameters was developed using Design of Experiments (DOE) applied through Taguchi method. Analysis of variance was applied to determine the individual importance of each parameter. In order to indicate the best levels for improve lap shear strength values, larger-the better quality’s category was used. The Taguchi analysis predicted the optimized welding condition and results showed that dwell time acquired the highest effect on the weld strength, followed by rotational speed and plunge depth.

The solid-state joining technique, Friction Spot Welding (FSpW), is able to produce spot-like joints in distinct sort of materials, especially in lightweight alloys, being an important solution to reduce the structural weight in the transport sector, and thus, minimize the fuel consumption. Some characteristics that make the FSpW advantageous are defect-free joints produced with high strength, high energy efficiency, reduction in the number of process steps, no post processing required due to high surface quality, high welding speeds and high environmental compatibility. The study of FSpW parameters and their influence on lap shear strength of AA5754 aluminium alloy welds were described in the present work. The optimization of welded parameters was developed using Design of Experiments (DOE) applied through Taguchi method. Analysis of variance was applied to determine the individual importance of each parameter. In order to indicate the best levels for improve lap shear strength values, larger-the better quality’s category was used. The Taguchi analysis predicted the optimized welding condition and results showed that dwell time acquired the highest effect on the weld strength, followed by rotational speed and plunge depth.

Keywords

Friction spot welding; AA5754 aluminium alloy; Taguchi method.

Friction spot welding; AA5754 aluminium alloy; Taguchi method.