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

YULIANTO, EKO (2019) PENGARUH KECEPATAN PUTARAN SPINDLE 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 spindle speed variations of 910 rpm, 1500 rpm and 2280 rpm, feedrate of 18 mm/minute and pin depth of 3,5 mm. The tests performed were tensile strength, hardness and micro structure on each variation. The results showed that the highest tensile strength and strain occurred in the welding with a spindle rotation speed of 1500 rpm for 236,50 MPa and 3,48. The lowest tensile strength and strain then occured during welding with a spindle rotation speed of 2280 rpm for 125,93 MPa and 2,10. The highest hardness value in the nugget area was obtained in welding with a spindle speed of 2280 rpm for 136 VHN and the lowest hardness value was generated in welding with a spindle speed of 1500 rpm for 126,6 VHN. The results of micro structure photographs in the nugget zone and TMAZ (Thermomecanically Affected Zone) areas were changed according to the spindle speed rotation.

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