Heat Treatment of Aluminum-Titanium-Compounds Made by Co-Extrusion and Friction Welding

Abstract:

The combination of aluminum and titanium alloys allows for designing lightweight structures with tailor-made properties at the macroscopic global as well as at the microscopic scale. In this context both co-extrusion and friction welding offer a great potential for advanced solutions for products with material combinations of aluminum and titanium. While titanium alloys show particular high mechanical strength and good corrosion resistance, aluminum alloys provide a considerable high specific bending stiffness along with low materials costs. Since the mechanical properties of metallic composites highly depend on the existence and formation of the intermetallic layer in the bonding zone compounds were processed by co-extrusion and friction welding and subsequent heat treatment to investigate the strength and the composition of the bonding zone. The results of friction welded samples concerning the intermetallic layer that was formed during heat treatment were compared with those directly after the co-extrusion. In this layer an enrichment of elements which origin from the aluminum alloy, particularly silicon, was observed. The layer was characterized by optical microscopy, scanning electron microscopy as well as electron probe micro analysis. The mechanical properties were determined by tensile tests.

• Periodical: Materials Science Forum (Volumes 794-796)
• Pages: 839-844
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.794-796.839
• Online since: June 2014
• Authors: Barbara Striewe*, Axel von Hehl, Norbert Grittner, Mirko Schaper, Florian Nürnberger
• Keywords: Aluminum (Al), Co-Extrusion, Friction Welding, Heat Treatment, Intermetallic Layer, Titanium

References

[1] J. Wilden, J. P. Bergmann: Möglichkeiten zum Herstellen von Mischverbindungen durch Diffusionsschweißen. Schweißen und Schneiden, 2004, 56 (5), p.199.

[2] P. G. Partridge, C. M. Ward-Close: Diffusion bonding of advanced materials. Metals and Materials, 1989, 5 (6), p.334.

[3] J. Hirsch: Walzen von Flachprodukten. Wiley-VCH, Weinheim, (2001).

[4] M. Schmidtchen, P. Simecek, D. Hadjuk: International Conference on Metal Forming - MEFORM 2004, Freiberg, Deutschland, 2004, pp.81-110.

[5] J. S. Lee, T. H. Son, C. S. Kang, C. H. Yun, S. C. Lim, H. C. Kwon: Fabrication and characterisation of Ti-Cu clad materials by direct extrusion; Journal of Materials Processing Technology 187-188 (2007), pp.653-656.

DOI: 10.1016/j.jmatprotec.2006.11.144

[6] J. J. Theler, A. Wagner, A. Ames: Herstellung von Aluminium/ Stahl-Verbundstromschienen mit metallurgischer Bindung zwischen Aluminium und Stahl durch Verbundstrangpressen. Metallwissenschaft und Technik 30 (1976) 3, pp.223-227.

[7] F. Ostermann: Anwendungstechnologie Aluminium, 2. Auflage, Springer-Verlag, Berlin, (2007).

[8] A. Fuji, K. Ameyama, T. H. North: Influence of silicon in aluminium on the mechanical properties of titanium/aluminium friction joints. Journal of Materials Science 30 (1995) 5185-5191.

DOI: 10.1007/bf00356068

[9] A. Fuji, M. Kimura, T. H. North, K. Ameyama, and M. Aki: Mechanical properties of titanium-5083 aluminium alloy friction joints. Materials Science and Technology, August 1997, Vol. 13, pp.673-678.

DOI: 10.1179/mst.1997.13.8.673

[10] M. Peters, C. Leyens: Titan und Titanlegierungen, WILEY-VCH Verlag, Weinheim, (2002).

[11] R. Boyer, G. Welsch, E. W. Collings: Materials Properties Handbook: Titanium alloys, Materials Park, Ohio, ASM International, (1994).

[12] W. Hesse: Aluminium-Werkstoffdatenblätter, 5. Auflage, Aluminium Verlag, Düsseldorf, (2007).