Abstract

The properties of lap joints performed by FSW have been studied in this investigation. Similar and dissimilar combinations have been studied using AA6082-T6 and AA5754-H22 aluminum alloys. The effect of several joining variables on the mechanical and microstructural properties of the joints have been analyzed using different tool designs and welding parameters such as rotational speed and weld speed. The influence of welding parameters and probe design have been found to produce a very strong impact on effects such as hook feature formation and effective sheet thickness of the joints which greatly influence the properties of the joints. It has been concluded that using appropriate tool designs and welding conditions, the flow of the plasticized material can be driven to avoid the formation of undesired joint features and maximize the strength of the joints.

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