PENGARUH FEEDING-SPEED TERHADAP STRUKTUR-MIKRO DAN SIFAT-MEKANIS SAMBUNGAN FRICTION STIR WELDING PADA ALUMINIUM PADUAN 6061
Keywords:
Aluminum-alloy, friction stir welding, feeding-speed, microstructure, mechanical propertiesAbstract
Abstrak
Penelitian ini bertujuan untuk mengetahui pengaruh feeding speed terhadap struktur mikro dan sifat mekanis sambungan friction stir welding (FSW) pada Aluminium Paduan Seri 6061. Pada umumnya, daerah sambungan las FSW mengalami proses pelunakan dan penurunan sifat mekanis dibanding logam induknya.
Proses FSW dilakukan pada aluminium paduan 6061 dengan tebal 3 mm, dengan sambungan las jenis butt joint. Mesin yang digunakan dalam proses FSW ini adalah mesin Milling dengan variabel feeding speed masing-masing sebesar 18; 22,5; 27 (mm/menit) dan putaran tools tetap 910 rpm.
Hasil pengujian pada sambungan FSW dengan variabel feeding speed sebesar : 18; 22,5; 27 (mm/menit) dan putaran tools tetap sebesar 910 rpm menunjukkan kekuatan tarik optimum pada feeding speed 27 mm/menit sebesar 206 MPa, sedangkan hasil pengujian impact menunjukkan nilai impact optimum pada feeding speed 18 mm/menit yaitu sebesar 0,624 J/mm2.
Abstract
The objective of this research is to find out the effect of feeding speed on microstructure and mechanical properties in Al 6061 alloy that has undergone a process of friction stir welding (FSW). In general, local FSW welded joints undergo softening and decreased mechanical properties than the parent metal.
FSW process performed on aluminum 6061 alloys with a thickness of 3 mm, with the weld type butt joint. Machines used in the FSW process is a milling machine with a feeding speed by 18; 22,5; 27 mm / min and a spindle rotation speed of 910 rpm.
The test results on FSW process with a feeding speed by 18; 22,5; 27 mm / min and a spindle rotation speed of 910 rpm showed the optimum of tensile stress with a feeding speed by 27 mm / min of 206 MPa and the test results of an impact test showed the optimum of impact with a feeding speed by 18 mm / min of 0,624 J/mm2.
References
Adamowski, J. and Szkodo, M. (2007), Friction stir welds (FSW) of aluminium alloy AW6082-T6 2007, Jurnal of achievements in materials and manufacturing engineering, Vol. 20.
ASTM, 2004, Standard Specification for aluminium and aluminium alloy sheet and plate, vol. 02.02, Designation : B 209-00.
Bradley, GR, dkk., 2000, Geometry and Microstructure of Metal Inert Gas and Frictioan Stir Welded Aluminium Alloy 5383-H321.
Caballero, (2011), Overall mechanical behavior of friction stir welded joints superficially treated by laser shot peening, Jurnal Anales de Mecanica de la fractura, vol. 2.
Cavaliere P., (2006), Effect of welding parameters on mechanical and microstructural properties of AA6056 joints produced by Friction Stir Welding, Journal of Materials Processing Technology 180, hal. 263-270.
Engineering Division Handbook, 1999, Technical Data Aluminium, Aluminium City (Pty) Limited.
Ilman, M.N., 2011, “Teknik Pengelasan TKM 6267”, Teknik Mesin & Industri Pascasarjana, UGM, Yogyakarta.
Kazuhiro Nakata, dkk., (2000), Weldability of high strength aluminium alloys by friction stir welding, ISIJ International, vol. 40, pp. S15-S19.
Kumar, K. and Kailas, S.V., (2008), The role of friction strir welding tool on material flow and weld formation, Jurnal Materials Science & Engineering A 485 p. 367-374.
Mandal, 2005, “Aluminum Welding”, 2nd ed., Narosa Publishing House, New Delhi.
Muhaimin, 2010, Pengaruh Perlakuan Panas Pelarutan T351 pada Perilaku Korosi Paduan Aluminium AA2024 Dalam Larutan 0.05 M NaCl.
Nusyirwan, 2001, Pengaruh kekasaran permukaan logam pada akurasi hasil uji kekerasan dengan metode indentasi, Jurnal R&B, Vol.1 no.2.
Pranjono, dkk., 2008, Uji kekasaran permukaan kelongsong zirkaloy-4 dan pellet UO2 sinter dengan alat roughness checker type surtonic-25, Jurnal Hasil penelitian EBN.
Reddy, G.M., dkk., 2006, Microstructure, residual stress distribution and mechanical properties of friction stir AA6061 aluminium alloy weldments, Proc. Seminar Nasional on Non-Destructive Evaluation, India.
Thomas, W., (1991), Friction Stir Welding, The Welding Institute.
Waris, 2011, Pengaruh Inhibator Kalium Chromat Terhadap Laju Korosi dan Perambatan Retak Fatik pada Al 2024-T3 dengan Media Air Laut, Pascasarjana, UGM, Yogyakarta.
William, R., (1997), Welding Handbook, 8th ed, Vol.3, Miami.
Wiryosumarto, H. dkk., 2008, Teknologi Pengelasan Logam, PT Pradnya Paramita, Jakarta.
