Numerical simulation of FSW and FSSW with pinless tool of AA6061-T6 Al alloy by CEL approach

Authors

1 Ph.D. Student, Mech. Eng., Tabriz Univ., Tabriz, Iran

2 Assoc. Prof., Mech. Eng., Tabriz Univ., Tabriz, Iran.

Abstract

Friction Stir welding (FSW) is a solid state technique that was invented to eliminate the limitations of welding of aluminum alloys. In the present study numerical simulation of friction stir welding and friction stir spot welding (FSSW) of AA6061-T6 aluminum alloy by pinless tool which has an embedded part with same material of the workpiece was performed in four different diameters. The temperature peak generated in the process was recorded for all simulation states and compared with previous experimental data for validation purposes. It has been found that in the FSSW process, the heat generation and temperature increase is higher than the FSW process, which is due to the Lack of transitional speed in this case and the increase in heat in a smaller volume section. Investigation of the vertical reaction force of tool was performed in FSSW, it was observed that if an embedded part in tool is used, the peak force is reduced and the amount of this decrease will increase with increasing the diameter of the embedded aluminum section. In the case of using d10 tool, the peak force compared to the d0 tool was about 10% lower.

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References

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Journal of Solid and Fluid Mechanics
Volume 8, Issue 3
October 2018
Pages 65-75

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