Paper Titles

Studies of Diffusion Processes in AlAs/GaAs Resonant-Tunneling Heterostructures
p.48

On New Modifications of Some Strength Criteria for Anisotropic Materials
p.53

Surface Morphology and Corrosion Behavior in Nano PMEDM
p.61

Laser Cladding of In Situ Al-AlN Composite on Light Alloys Substrate
p.66

Friction Stir Welding of Dissimilar Al-Cu Lap Joints with Copper on Top
p.71

Modern Engineering Techniques for Designing Materials with a Specified Set of Properties
p.77

Electrochemical Properties of Carbon-Coated NbO₂ as a Negative Electrode for Lithium-Ion Batteries
p.87

Effects of Poly(Vinylidene Fluoride) Content on Electrochemical Properties of a Graphite Negative Electrode in Lithium Secondary Batteries
p.92

Electrochemical Properties of Li₄Ti₅O₁₂ as a Negative Electrode for Calcium Secondary Batteries in Ca(TFSI)₂/THF Electrolyte
p.97

HomeKey Engineering MaterialsKey Engineering Materials Vol. 724Friction Stir Welding of Dissimilar Al-Cu Lap...

Friction Stir Welding of Dissimilar Al-Cu Lap Joints with Copper on Top

Article Preview

Abstract:

Friction stir welding (FSW) is a solid state welding process that has been studied for dissimilar welding applications, especially aluminum and copper. However, the quality of dissimilar Al/Cu FSW joints is often impaired due to the formation of intermetallic compounds (IMCs), which affect both mechanical and electrical properties. This paper investigates the feasibility of FSW in producing dissimilar Al/Cu lap joints were copper is positioned over aluminum. In order to access the influence of rotational speed over the resulting joint, four different rotational speeds were tested for the same welding speed. The produced joints were then evaluated in terms of weld appearance, defects and the electrical resistance of the welded joints. Visual and ultrasound inspection indicated no discontinuity in any of the produced samples. Electrical resistance results indicate no influence of rotational speed. Moreover, electrical resistance of the Al/Cu FSW lap joints were smaller than the average between the electrical resistances of single metal joints welded with the tested materials in similar conditions. The experiments indicate that is possible to produce sound Al/Cu lap welds for the parameter window used, including the positioning of copper over aluminum, that is discouraged by literature. The small values of electrical resistance indicate no deleterious effect of IMCs over this characteristic.

You might also be interested in these eBooks

Smart Materials Technologies

Info:

Periodical:

Key Engineering Materials (Volume 724)

Pages:

71-76

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.724.71

Citation:

Cite this paper

Online since:

December 2016

Authors:

Aldoni G. Wiedenhoft, Heraldo J. Amorim, Tonilson S. Rosendo, Telmo R. Strohaecker

Keywords:

Al/Cu Dissimilar Welding, Electrical Resistance of Welded Joints, Friction Stir Welding

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

[1] W.M. Thomas, E.D. Nicoholas, J.C. Needham, M.G. Church, S.P. Temple, C.J. Dawes: GB patent application 9125978-8 (1991).

[2] M. Ericsson, R. Sandstrom: Influence of welding speed on the fatigue of friction stir welds, and comparison with MIG and TIG. Int. J. Fatigue Vol. 25 (2003), p.1379–1387.

DOI: 10.1016/s0142-1123(03)00059-8

[3] L. Pryor, R. Schlobohm, B. Brownell: A comparison of aluminum vs. copper as used in electrical equipment. GE Consumer & Industrial (2009).

[4] T.A. Mai and A.C. Spowage: Characterization of dissimilar joints in laser welding of steel–kovar, copper–steel and copper–aluminum. Mater Sci Eng A Vol 374 (2004), p.224–233.

DOI: 10.1016/j.msea.2004.02.025

[5] T.M. Mozhaiskaya and N.T. Chekanova: Structure and properties of welded aluminum–copper joints. Met Sci Heat Treat Vol. 32(12) (1990), p.938–939.

DOI: 10.1007/bf00700088

[6] W.B. Lee, M. Schmuecker, U.A. Mercardo, G. Biallas, S.B. Jung: Interfacial reaction in steel–aluminum joints made by friction stir welding. Scripta Mater. Vol. 55(4) (2006) pp.355-358.

DOI: 10.1016/j.scriptamat.2006.04.028

[7] W. Tang, X. Guo, J.C. McClure, L.E. Murr, A. Nunes: Heat Input and Temperature Distribution in Friction Stir Welding, J. Mater. Process. Manu. Vol. 37(2) (1998), pp.163-172.

DOI: 10.1106/55tf-pf2g-jbh2-1q2b

[8] M. Braunovic, and N. Alexandrov: Intermetallic Compounds at Aluminium-to-Copper Electrical Interfaces: Effect of Temperature and Electric Current. IEEE T. Compon. Pack. A Vol. 17(1) (1994), pp.78-85.

DOI: 10.1109/95.296372

[9] I. Galvão, D. Verdera, D. Gesto, A. Loureiro, D.M. Rodrigues: Influence of aluminium alloy type on dissimilar friction stir lap welding of aluminium to copper. J. Mater. Process. Tech. Vol. 213 (2013), p.1920-(1928).

DOI: 10.1016/j.jmatprotec.2013.05.004

[10] J. Ouyang, E. Yarrapareddy, R. Kovacevic: Microstructural evolution in the friction stir welded 6061 aluminum alloy (T6-temper condition) to copper. J. Mater. Process. Tech Vol. 172 (2006), p.110–122.

DOI: 10.1016/j.jmatprotec.2005.09.013

[11] A. Abdollah-Zadeh, T. Saeid, B. Sazgari:. Microstructural and mechanical properties of friction stir welded aluminum/copper lap joints. J. alloy. Compd. Vol. 460 (2008), pp.535-538.

DOI: 10.1016/j.jallcom.2007.06.009

[12] Saeid, T.; Abdollah-Zadeh, A.; Sazgari, B. Weldability and Mechanical Properties of Dissimilar Aluminum-Copper Lap Joints Made by Friction Stir Welding. J. alloy. Compd. Vol. 490 (2010), pp.652-655.

DOI: 10.1016/j.jallcom.2009.10.127

[13] A.K. Lakshminarayanan, S. Larvizhi, V. Balasubramanian: Developing friction stir welding window for AA2219 aluminium alloy. T. Nonferr. Metal. Soc. Vol. 21 (2011), pp.2339-2347.

DOI: 10.1016/s1003-6326(11)61018-2

[14] M. Akbari1, R. Abdi Behnagh, A. Dadvand: Effect of materials position on friction stir lap welding of Al to Cu. Sci. Technol. Weld. Joi. Vol. 17 (2012), pp.581-588.

DOI: 10.1179/1362171812y.0000000049

[15] V. Firouzdor and S. Kou: Al-to-Cu Friction Stir Lap Welding. Metall. Mater. Trans. A, Vol. 43a (2012), pp.303-315.

DOI: 10.1007/s11661-011-0822-9

[16] L.S. Rosado, T.G. Santos, M. Piedade, P. Ramos, P. Vilaça: Advanced technique for non-destructive testing of friction stir welding of metals. Measurement, Vol. 43 (2010), pp.1021-1030.

DOI: 10.1016/j.measurement.2010.02.006

[17] E.T. Akinlabi, D.M. Madyira, S.A. Akinlabi: Effect of Heat Input on the Electrical Resistivity of Dissimilar Friction Stir Welded Joints of Aluminium and Copper. IEEE Africon (2011).

DOI: 10.1109/afrcon.2011.6071973

[18] T.G. Santos, R.M. Miranda, P. Vilaça, P.J. Teixeira: Modification of electrical conductivity by friction stir processing of aluminum alloys. Int. J. Adv. Manuf. Technol. Vol. 57 (2011), p.511–519.

DOI: 10.1007/s00170-011-3308-4

[19] K. Savolainen, J. Mononen, T. Saukkonen, H. Hnninen: A preliminary study on friction stir welding of dissimilar metal joints of copper and aluminium. Proc 6th International FSW symposium (2006). Montreal, Canada. Retrieved: CD-ROM.

[20] M. Akbari, R.A. Behnagh, A. Dadvand: Effect of materials position on friction stir lap welding of Al to Cu. Sci. Technol. Weld. Joi. Vol. 17(7) (2012), pp.581-588.

DOI: 10.1179/1362171812y.0000000049