Investigations on the Mechanical Properties and Formability of Friction Stir Welded Tailored Blanks


Article Preview

Tight competition characterizing automotive industries in the last decades has determined a strong research effort aimed to improve utilized processes and materials in sheet stamping. As far as the latter are regarded light weight alloys, high strength steels and tailored blanks have been increasingly utilized with the aim to reduce parts weight and fuel consumptions. In the paper the mechanical properties and formability of tailored welded blanks made of a precipitation hardenable aluminum alloy but with different sheet thicknesses, have been investigated: both laser welding and friction stir welding have been developed to obtain the tailored blanks. For both welding operations a wide range of the thickness ratios has been considered. The formability of the obtained blanks has been characterized through tensile tests and cup deep drawing tests, in order to show the formability in dependency of the stress condition; what is more mechanical and metallurgical investigations have been made on the welded joints.



Main Theme:

Edited by:

F. Micari, M. Geiger, J. Duflou, B. Shirvani, R. Clarke, R. Di Lorenzo and L. Fratini




G. Buffa et al., "Investigations on the Mechanical Properties and Formability of Friction Stir Welded Tailored Blanks", Key Engineering Materials, Vol. 344, pp. 143-150, 2007

Online since:

July 2007




[1] Kleiner, M., Geiger, M., Klaus, A., 2003, Annals of the CIRP, 52/2: 521-542.

[2] Hoffmann, P., Geiger, M., 1995, Annals of the CIRP, 44/1: 151-154.

[3] Ricciardi, G., Cantello, M., Mariotti, F., Castelli, P., Penasa, M., 1999, Annals of the CIRP, 48/1: 159-162.

[4] Geiger, M., Merklein, M., Kerausch, M., 2004, Annals of the CIRP, 53/1: 223-226.

[5] Guerra, M., Schmidt, C., McClure, L.C., Murr, L.E., Nunes, A.C., 2003, Materials characterization, 49: 95-101.

[6] Liu, H.J., Fujii, H., Maeda, M., Nogi, K., 2003, J. of Materials Processing Technology, 142: 692-696.

[7] Rhodes, C.G., Mahoney M.W., Bingel, W.H., Spurling, R.A., Bampton, C.C., 1987, Scripta Materialia, 36/1: 69-75.


[8] Fratini, L., Buffa, G., Hua, J., Shivpuri, R., 2006, Annals of CIRP, 55/1: 279-282.

[9] Geiger, M., Merklein, M., Giera, A., 2004, Proceedings of IDDRG 2004, Sindelfingen, Germany, 114-123.

[10] Merklein, M., Giera, A., Staud, D., 2005, Proceedings of the 8th ESAFORM Conference On Material Forming, The Romanian Academy Publishing House Bucharest, 273-276.