Tensile Strength and Macro-microstructures of A6061 CDFW Weld Joint Influenced by Pressure and Holding Time in the Upset Stage
Keywords:Aluminum Alloys, Continuous Drive Friction Welding, Upset Pressure, Tensile Strength, Macro-Micro Structures
This paper aims to analyze the effect of pressure and holding time in the upset stage on tensile strength and macro-microstructures of continuous drive friction welded (CDFW) joints of aluminum alloys A6061. Friction weld specimens were welded using variations of upset pressure (40, 80, 120 MPa). The upset holding time was varied from 3, 10, to 20 seconds. Tensile strength test was conducted based on the AWS standard. The result showed that the higher upset pressure and the longer holding time in the upset stage are able to reduce the porosity of the CDFW weld joint and cause a higher tensile strength of the specimens. Meanwhile, from macro-mic restructures observation results, it was found that the specimen with maximum tensile strength has a wider partly deformed area (ZPD) and finer grains in the center of the specimen longitudinal section compared to those of the specimens with minimum tensile strength. It was occurred due to plastic deformation as the result of the higher pressure and the longer holding time in the upset stage. Fracture surface observation results indicate that in the specimen with a higher upset pressure and a longer holding time, has inflated fracture surface and the fracture zone exists in the heat affected zone, not in the interface like that of the specimen with lower tensile strength due to the lower upset pressure and the shorter holding time.
Olson, D.L., Siewert, A., Thomas, A., Stephen, L., and Edward, G.R., 1993, ASM Handbook: Welding, Brazing, and Soldering, Vol. 6, ASM International, New York.
Irawan, Y.S., Wirohardjo, M., and Maâ€™arif, M.S., 2012, Tensile Strength of Weld Joint Produced by Spinning Friction Welding of Round Aluminum A6061 with Various Chamfer Angles, Advanced Materials Res.,vol. 567, pp. 761â€“765,.
Sathiya, P., Aravindan, S., and Noorul Haq, A., 2007, Effect of Friction Welding Parameters on Mechanical and Metallurgica Properties of Ferritic Stainless Steel, Int. J. Adv. Manufacturing Tech., vol. 31, no. 11-12, pp.1076â€“1082.
Jiang, W.H., and Kovacevic, R., 2004, Feasibility Study of Friction Stir Welding of 6061-T6 Aluminum Alloy with AISI 1018 Steel Proc. of the Institution of Mechanical Engineers, Part B, Journal of Eng.Manuf., vol. 218, Iss.10, pp. 1323â€“1331.
Sathiya, P., Aravindan, S., and Noorul Haq, A., 2004, Friction welding of austenitic stainless steel and optimization of quality, Proceeding Int. Symp. Res, Students on Materials Science and Engineering, pp. 1â€“10.
Spindler, D.E., 1994, What industry needs to know about friction welding, Welding Journal, March, pp.37-42.
Ozdemir N., 2005, Investigation of the mechanical properties of friction-welded joints between AISI 304L, AISI Steel as a function rotational speed. Mater Lett, Vol. 59, pp. 2504â€“2509.
Ozdemir N., Sarsilmaz F., and Hascalik A., 2007, Effect of rotational speed on the interface properties of friction-welded AISI 304L to 4340 steel. Mater, Vol. Des 28, pp. 301â€“307.
Santoso, E.B., Irawan, Y.S., Sutikno, E., 2012, Pengaruh Sudut Chamfer dan Gaya Tekan Akhir terhadap Kekuatan Tarik dan Porositas Sambungan Las Gesek pada Paduan Al-Mg-Si, Jurnal Rekayasa Mesin, Vol.3.No.1, pp.293-298.
Tyagita, D.A., Irawan, Y.S., Suprapto, W., 2014, Kekuatan Puntir dan Porositas Hasil Sambungan Las Gesek AlMg-Si dengan Variasi Chamfer dan Gaya Tekan Akhir, Jurnal Rekayasa Mesin, Vol.5.No.1, pp.69-74.
Irawan, Y.S., Amirullah, M., Gumilang, G.B.D., Oerbandono, T., and Suprapto, W., 2016, Torsion Strength of Continuous Drive Friction Weld Joint of Round Bar Aluminum A6061 Affected by Single Cone Geometry of Friction Area, AIP Conference Proceedings 1717, pp. 040010-1 - 040010-6.
Irawan, Y.S., Suprapto, W., Oerbandono, T., January, A.R., Wijaksono, A.K.M., and Fauzan, R., 2017, Torsion strength of Round Bar A6061 Friction Weld Joint Influenced by Friction Time , Upset Force and One Side Cone Geometry, Journal of Environmental Engineering & Sustainable Technology, Vol.4, No.02, pp.78-84.
American Welding Society, 2007, AWS Standard B4.0:2007.
This work is licensed under aÂ Creative Commons Attribution-NonCommercial 4.0 International License.