Effect of Stationary shoulder Addition on Tensile Strength and Scanning Electron Microscope (SEM) of Friction Stir Welding (FSW) in 3D Printed Polylactic Acid (PLA) Materials
Pengaruh Penambahan Stationary shoulder pada Kekuatan Tarik dan Scanning Electron Microscope (SEM) Sambungan Friction Stir Welding (FSW) pada Material Polyactic Acid (PLA) Hasil 3D Printing
DOI:
https://doi.org/10.21070/ups.11393Keywords:
Tensile Strength, Friction Stir Welding, Polylactic Acid, 3D PrintingAbstract
This study investigates the effect of tensile strength and microstructure of Friction Stir Welding (FSW) joints on 3D-printed Polylactic Acid (PLA) with a stationary shoulder. FSW was selected to overcome the size limitations of 3D-printed parts. Experiments varied preheating temperature, tool rotation speed (KRT), and welding speed (KP), while tensile and Scanning Electron Microscope (SEM) tests evaluated joint strength and morphology. SEM analysis showed that the SP9 specimen (100°C preheating) had a denser, more homogeneous microstructure than the unheated sample (STP). SP9 also achieved the highest tensile strength (19.92 MPa) at 100°C, 75 mm/min welding speed, and 950 rpm tool rotation, compared to 11.3 MPa for STP. Pearson correlation and ANOVA revealed that KRT had the strongest effect on tensile strength (r = 0.907; p < 0.001), while 100°C provided the most uniform and highest average strength. KP showed a very weak, insignificant effect.
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