PENGARUH VARIASI BENTUK PIN TOOL TERHADAP SIFAT MEKANIK SAMBUNGAN LAS TIPE FRICTION STIR WELDING PADA ALUMINIUM SERI 2024 T3

WOLFRENDY DIMA, ZANDY (2019) PENGARUH VARIASI BENTUK PIN TOOL TERHADAP SIFAT MEKANIK SAMBUNGAN LAS TIPE FRICTION STIR WELDING PADA ALUMINIUM SERI 2024 T3. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Welding technology with the Friction Stir Welding (FSW) method is a solid-state joining process that can be used to connect aluminum material that has low weldability. The FSW process utilizes the rotation of a tool that swipes two metal plates to be joined. Aluminum 2024 T3 with a thickness of 4 mm is connected using the FSW process with variations in the shape of the pin tool Cone, cylinder and screw cylinder with a pin depth of 3 mm. The tests carried out are tensile, hardness test and microstructure test on each welding variation. The results showed that the highest tensile strength and tensile strain occur in welding with the shape of a threaded cylinder pin tool of 266,06 MPa and 3,82%. The tensile strength and tensile strain on welding with a conical pin tool shape 191,33 MPa and 2,2% are equal to the value of the tensile strength and tensile strain on welding with a cylindrical pin tool shape that is equal to 191,40 MPa and 2,1% .The highest hardness value in the nugget zone was produced in welding with the shape of a thread cylinder pin tool 199,30 VHN and the lowest hardness value generated in welding with a conical pin tool shape 128,39 VHN. The results of microstructure photographs in the nugget zone area experienced changes in grain size and grain boundaries finer along with changes in temperature during welding caused by the shape of the pin tool.

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