Influence of tool geometry and processing parameters on welding defects and mechanical properties for friction stir welding of 6061 Aluminium alloy

International Conference on Recent Advances in Materials & Manufacturing Technologies

Daneji, A.^1 ; Ali, M.^1 ; Pervaiz, S.^1

Department of Mechanical and Industrial Engineering, Rochester Institute of Technology, Dubai Campus, Box 341055, Dubai, United Arab Emirates^1

关键词: 6061 aluminium alloy;    6061 aluminum alloys;    Friction stir welding(FSW);    Input parameter;    Output parameters;    Processing parameters;    Solid-state welding process;    Square butt joints;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/346/1/012041/pdf
DOI  :  10.1088/1757-899X/346/1/012041

来源: IOP

【 摘 要 】

Friction stir welding (FSW) is a form of solid state welding process for joining metals, alloys, and selective composites. Over the years, FSW development has provided an improved way of producing welding joints, and consequently got accepted in numerous industries such as aerospace, automotive, rail and marine etc. In FSW, the base metal properties control the material's plastic flow under the influence of a rotating tool whereas, the process and tool parameters play a vital role in the quality of weld. In the current investigation, an array of square butt joints of 6061 Aluminum alloy was to be welded under varying FSW process and tool geometry related parameters, after which the resulting weld was evaluated for the corresponding mechanical properties and welding defects. The study incorporates FSW process and tool parameters such as welding speed, pin height and pin thread pitch as input parameters. However, the weld quality related defects and mechanical properties were treated as output parameters. The experimentation paves way to investigate the correlation between the inputs and the outputs. The correlation between inputs and outputs were used as tool to predict the optimized FSW process and tool parameters for a desired weld output of the base metals under investigation. The study also provides reflection on the effect of said parameters on a welding defect such as wormhole.