Regression Modelling of Joining Aluminium Studs to Steel with AA 1100 Interlayer
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Recently, there is a steep increase in the requirement for aluminium-steel joints in several automotive and structural applications. But joining of dissimilar metals possesses unique challenges. To overcome these issues, AA 1100 interlayer has been proposed in the friction stud welding of AISI 1030/AA 1050 joints. In the present work, it is found that the use of interlayer not only enhances the joint strength but also inhibits the formation of flash and thereby reduces the consumption of base metals. Applying full factorial design, experiments were conducted to study the influence of interlayer thickness along with other parameters such as rotational speed, friction time and friction pressure on the strength of joint. SEM evaluation on the fractured surface of the specimens was carried out. Ductile mode fracture with dimples observed with 0.95 mm interlayer. Microvoids absorb a lot of energy, and the toughness is high. Hence, the dissimilar joint made using 0.95 mm interlayer have high joint strength. Microhardness measurement across the interfacial region shows increased value near the weld line due to increased plastic deformation. Finally, regression analysis is carried out and an empirical relation has been developed to predict impact strength and axial shortening length in terms of other parameters.
KeywordsFriction stud welding Mechanical properties Scanning electron microscopy
Authors gratefully acknowledge the financial support of this work by SERB of Department of Science & Technology, New Delhi. (Vide Letter No.: SERB / F / 1452 / 2013-2014 dated 10.06.2013).
- 1.Akata HE, Ozeol K, Sahin M (2006) An experimental study on joining of severe plastic deformed aluminium materials with friction welding method. Mater Des:1–10Google Scholar
- 3.Akata HE, Sahin M, Gulmez T (2005) Characterization of mechanical properties in AISI 1040 parts welded by friction welding. Mater Charact:1–6Google Scholar
- 4.Elliot S, and Wallach ER (1981) Joining aluminum to steel- 2. Met Constr 13(4):221–225Google Scholar
- 5.Hartwig H, and Kouptsidis JS (1977) 7th Int Vaccum Cong. And 3rd Conf on solid surfaces, Vienna, Ostemichsche Sutdeingesellschaff fur Atomenergie: 259–262Google Scholar
- 6.Dunkerton SB (1983) Reporf 229/1982, TWI. Abington Hall, CambridgeGoogle Scholar
- 7.Ambroziak A, Korzeniowski M, Kustron P (2007) Friction welding of dissimilar metal joints with intermediate layers. J Achiev Mater Manuf Eng 21(2):37–40Google Scholar
- 12.Hynes NRJ, Nagaraj P, Sujana JAJ Ultrasonic evaluation of friction stud welded AA6063/AISI1030 steel joints. Mater Des 62:118–123Google Scholar
- 13.Dunkerton SB (1986) Toughness properties of friction weld in steels. Weld J 65:193S–202SGoogle Scholar
- 15.Hynes NRJ, Nagaraj P, Sujana JAJ Mechanical evaluation and microstructure of friction welded Aluminium-Mildsteel joints. Arab J Sci Eng. https://doi.org/10.1007/s13369-014-1082-y