Influência da geometria da ferramenta na soldagem de fricção por ponto e mistura mecânica (FSSW) da liga AA6060T5

Abstract

The FSSW process emerged in the automotive industry with the intention of being an alternative way of winning in light alloys, to minimize or even avoid the problems that occur in the union of aluminum alloys by conventional techniques. This treatment process is controlled due to good mechanical properties and low cost. However, optimizing the FSSW process can be difficult as the mechanical properties are strongly supported by direction and tool type parameters. This Course CompletionWork Project aims to investigate the effect of tool pin geometry on the FSSW processing process in aluminum alloy 6060-T5. The method used was the FSSW acceptance in 24 Exception of overlapping joints. The 3 mm thick plates were welded with two different tools for the comparative analysis between them, one conventional conical and the other with conical hexagonal geometry. The parameters used for the study were a constant rotation speed (VR) of 2000 rpm, and a constant penetration speed (VP) of 200 mm/min. As a study variable, the residence time (TP) was adopted, where values of 0, 2 and 4 s were reached. After welding, the samples underwent microhardness measurement experiments, metallographic testing and shear testing, to analyze the metallurgical and mechanical properties of the joint. Thus, we obtained and concluded that for the hexagonal tool, the dwell time was fundamental for metallurgical bonding to occur at TP = 0 s, and at TP = 2 s and TP = 4 s, the shear strength increased with the increase in TP. However, the shear strength of the hexagonal tool was lower compared to the conventional tool in all TP. Microhardness and metallographic tests not required with shear test results.