CD Skripsi
PENGARUH FEED RATE DAN LEBAR SHOULDER PADA FRICTION STIR WELDING (FSW) TERHADAP HASIL SAMBUNGAN LEMBARAN HIGH DENSITY POLYETHYLENE (HDPE)
Friction stir weld (FSW) is a solid-state welding process, where during the
process it creates frictional force on the material as well as heat from the tool,
namely the shoulder at the end of which there is a rotating pin that moves along the
surface of the material. Several parameters that influence the results of friction stir
welding include feed speed, rotating tool, welding tool, plunge depth, and welding
inclination angle. The parameters used are variations in feed rate between 14
mm/min, 19.5 mm/min and 25 mm/min, as well as variations in shoulder width of
20 mm and 30 mm. The specimen material used high density polyethylene (HDPE)
sheet with a thickness of 10 mm. The test method used is tensile testing to the ASTM
D638 type III standard. The research results showed that all tensile test specimens
had lower stress and strain values compared to the base material. Specimen B with
a feed rate of 19.5 mm/min and a shoulder width of 20 mm shows the most optimal
welding results with a tensile strength of 23.86 MPa or 94.79 % of the base material
and a strain value of 10,57 %. The lowest tensile strength was in specimen C with
a feed rate of 25 and a shoulder width of 20 mm, with a tensile strength of 21.71
MPa or 86.26 % of the base material and a strain value of 17,33 %. It can be
concluded from this research that increasing the feed rate tends to reduce the
tensile strength value, because the resulting heat production is low resulting in
incomplete mixing. An increase in shoulder width also causes a decrease in the
tensile strength value, because it causes the material to experience overflow due to
excessive heat production.
Keyword: Friction Stir Welding, High Density Polyethylene, Feed Rate, Shoulder
Tool.
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