Abstract
The present paper defines process windows for laser welding of thin copper and aluminum sheets in Al-Cu and Cu-Al lap-joint configurations, exploiting different process strategies and parameters. A single-mode continuous-wave (CW) laser source was exploited with both linear and wobbling strategies. In both cases the influence of several parameters, such as, laser power, spot dimensions and scanning speed on the resulting microstructure and joint strength was analyzed. The influence of one, two and three parallel beads on the maximum shear strength was also evaluated. The optimum process configurations were finally determined based on maximum joint strength in shear tests and the mixing of the two parent metals occurring after welding was determined by means of SEM-EDS analysis.
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Albright, C.E.: The fracture toughness testing of steel-aluminum deformation welds. Eng. Fract. Mech. 15(1–2), 193–203 (1981). https://doi.org/10.1016/0013-7944(81)90117-X
Date, H., Kobayakawa, S., Naka, M.: Microstructure and bonding strength of impact-welded aluminium–stainless steel joints. J. Mater. Process. Technol. 85(1–3), 166–170 (1999). https://doi.org/10.1016/S0924-0136(98)00284-2
Fukumoto, S., Tsubakino, H., Okita, K., Aritoshi, M., Tomita, T.: Amorphization by friction welding between 5052 aluminum alloy and 304 stainless steel. Scr. Mater. 42(8), 807–812 (2000). https://doi.org/10.1016/S1359-6462(00)00299-2
Lee, W.B., Schmuecker, M., Mercardo, U.A., Biallas, G., Jung, S.B.: Interfacial reaction in steel–aluminum joints made by friction stir welding. Scr. Mater. 55(4), 355–358 (2006). https://doi.org/10.1016/j.scriptamat.2006.04.028
Sierra, G., Peyre, P., Deschaux-Beaume, F., Stuart, D., Fras, G.: Steel to aluminium key-hole laser welding. Mater. Sci. Eng. A. 447(1–2), 197–208 (2007). https://doi.org/10.1016/j.msea.2006.10.106
Mai, T.A., Spowage, A.C.: Characterisation of dissimilar joints in laser welding of steel–kovar, copper–steel and copper–aluminium. Mater. Sci. Eng. A. 374(1–2), 224–233 (2004). https://doi.org/10.1016/j.msea.2004.02.025
Abbasi, M., Karimi Taheri, A., Salehi, M.T.: Growth rate of intermetallic compounds in Al/cu bimetal produced by cold roll welding process. J. Alloys Compd. 319(1–2), 233–241 (2001). https://doi.org/10.1016/S0925-8388(01)00872-6
Lee, W.B., Bang, K.S., Jung, S.B.: Effects of intermetallic compound on the electrical and mechanical properties of friction welded cu/Al bimetallic joints during annealing. J. Alloys Compd. 390(1–2), 212–219 (2005). https://doi.org/10.1016/j.jallcom.2004.07.057
Panaskar, N., Terkar, R.: A review on recent advances in friction stir lap welding of Aluminium and copper. Mater. Today. 4(8), 8387–8393 (2017). https://doi.org/10.1016/j.matpr.2017.07.182
Wei, Y., Li, J., Xiong, J., Zhang, F.: Investigation of interdiffusion and intermetallic compounds in Al–cu joint produced by continuous drive friction welding. Engr. Sci. Tech. 19(1), 90–95 (2016). https://doi.org/10.1016/j.jestch.2015.05.009
Fei, X., Ye, Y., Jin, L., Wang, H., Lv, S.: Special welding parameters study on cu/Al joint in laser-heated friction stir welding. J. Mater. Process. Technol. 256, 160–171 (2018). https://doi.org/10.1016/j.jmatprotec.2018.02.004
Raoelison, R.N., Sapanathan, T., Buiron, N., Rachik, N.: Magnetic pulse welding of Al/Al and Al/cu metal pairs: consequences of the dissimilar combination on the interfacial behavior during the welding process. J. Manuf. Process. 20(1), 112–127 (2015). https://doi.org/10.1016/j.jmapro.2015.09.003
Fujii, H.T., Endo, H., Sato, Y.S., Kokawa, H.: Interfacial microstructure evolution and weld formation during ultrasonic welding of Al alloy to cu. Mater. Charact. 139, 233–240 (2018). https://doi.org/10.1016/j.matchar.2018.03.010
Weigl M, Albert F, Schmidt M. Enhancing the ductility of laser-welded copper-aluminum connections by using adapted filler materials. Phys. Procedia 2011;12(B):332–338. https://doi.org/10.1016/j.phpro.2011.03.141
Solchenbach, T., Plapper, P.: Mechanical characteristics of laser braze-welded aluminium–copper connections. Opt. Laser Technol. 54, 249–256 (2013). https://doi.org/10.1016/j.optlastec.2013.06.003
Lee, S.J., Nakamura, H., Kawahito, Y., Katayama, S.: Effect of welding speed on microstructural and mechanical properties of laser lap weld joints in dissimilar Al and cu sheets. Sci. Technol. Weld. Join. 19(2), 111–118 (2014). https://doi.org/10.1179/1362171813Y.0000000168
Zuo, D., Hu, S., Shen, J., Xue, Z.: Intermediate layer characterization and fracture behavior of laser-welded copper/aluminum metal joints. Mater. Des. 58, 357–362 (2014). https://doi.org/10.1016/j.matdes.2014.02.004
Stritt, P., Hagenlocher, C., Kizler, C., Weber, R., Rüttimann, C., Graf, T.: Laser spot welding of copper-aluminum joints using a pulsed dual wavelength laser at 532 and 1064nm. Phys. Procedia. 56, 759–767 (2014). https://doi.org/10.1016/j.phpro.2014.08.083
Fetzer, F., Jarwitz, M., Stritt, P., Weber, R., Graf, T.: Fine-tuned remote laser welding of aluminum to copper with local beam oscillation. Phys. Procedia. 83, 455–462 (2016). https://doi.org/10.1016/j.phpro.2016.08.047
Schmalen, P., Plapper, P., Peral, I., Titov, I., Vallcorba, O., Rius, J.: Composition and phases in laser welded Al-cu joints by synchrotron x-ray microdiffraction. Procedia CIRP. 74, 27–32 (2018). https://doi.org/10.1016/j.procir.2018.08.006
Reisgen, U., Olschok, S., Jakobs, S., Holtum, N.: Influence of the degree of dilution with laser beam vacuum-welded cu-Al mixed joints on the electrical properties. Procedia CIRP. 74, 23–26 (2018). https://doi.org/10.1016/j.procir.2018.08.022
Kermanidis, T., Christodoulou, P.I., Hontzopoulos, E., Haidemenopoulos, G.N., Kamoutsi, H., Zervaki, A.D.: Mechanical performance of laser spot-welded joints in Al-Al/cu solar thermal absorbers. Mater. Des. 155, 148–160 (2018). https://doi.org/10.1016/j.matdes.2018.05.052
Acknowledgements
The authors would like to thank Dr. Flavia Lerra and Dr. Vincenzo Dimatteo for leading the experimental and characterization activity and Dr. Luca Poggio and Dr. Elena Ligabue for their technical and economic support.
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Fortunato, A., Ascari, A. Laser Welding of Thin Copper and Aluminum Sheets: Feasibility and Challenges in Continuous-Wave Welding of Dissimilar Metals. Lasers Manuf. Mater. Process. 6, 136–157 (2019). https://doi.org/10.1007/s40516-019-00085-z
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DOI: https://doi.org/10.1007/s40516-019-00085-z