PENGARUH FEEDRATE TERHADAP KEKUATAN TARIK, KEKERASAN DAN STRUKTUR MIKRO SAMBUNGAN LAS FRICTION STIR WELDING PADA ALUMINIUM SERI 2024-T3

HIDAYAT, SARIF (2019) PENGARUH FEEDRATE TERHADAP KEKUATAN TARIK, KEKERASAN DAN STRUKTUR MIKRO SAMBUNGAN LAS FRICTION STIR WELDING PADA ALUMINIUM SERI 2024-T3. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Friction stir welding (FSW) is a welding technology that is a solid state joining process tused to connect an aluminum material with low weldability. FSW process utilizes the rotation of the rubbing tools of two metal plates to join. Aluminum 2024 T3 with a thickness of 4 mm was joined using the FSW process with feedrate variations of 13mm/minute, 18mm/minute and 25 mm/minute, spindle rotation speed of 910 rpm and pin depth of 3 mm. The tests performed were tensile strength, hardness and microstructure on each variation. The results showed that the highest tensile strength and strain occurred in the welding with a feedrate of 25 mm/minute for 221,51 MPa and 3,60. The lowest tensile strength and strain then occured during welding with a feedrate of 13 mm/minute for 198,63 MPa and 2,26. The highest hardness value in the nugget area was obtained in welding with a feedrate of 25 mm/minute for 137 VHN and the lowest hardness value was generated in welding with a feedrate of 13 mm/minute for 105 VHN. The results of microstructure photographs in the nugget zone and TMAZ (Thermomecanically Affected Zone)areas were changed according tothe feedrate.

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