Visualization of Material Flow in a Refill Friction Stir Spot Welding Process Using Marker Materials

Paper #:
  • 2010-01-0971

Published:
  • 2010-04-12
Citation:
Kalagara, S., Muci-Kuchler, K., and Arbegast, W., "Visualization of Material Flow in a Refill Friction Stir Spot Welding Process Using Marker Materials," SAE Int. J. Mater. Manuf. 3(1):628-651, 2010, https://doi.org/10.4271/2010-01-0971.
Pages:
24
Abstract:
Friction Stir Spot Welding (FSSW) is a relatively new solid state joining technology that has the potential to be a replacement for single point joining processes like Resistance Spot Welding and rivet technology in certain applications. Since the material flow around the pin plays an important role in determining the quality of the weld, understanding how the material moves is important to optimize process parameters and to validate the results of numerical simulations of the process. In this paper, an experimental study aimed at visualizing the material flow during the plunge phase of refill FSSW of an aluminum alloy is presented. Different marker materials were placed at a certain depth from the plate surface and metallographic samples in three mutually perpendicular directions were prepared and examined to identify the final location of the marker material after the plunge of the pin. Based on the results of the metallographic study, inferences were made regarding the path of motion of the plate material.
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