TY - JOUR

T1 - Microstructural evolution in the bonding zones of co-extruded aluminium/titanium

AU - Dietrich, D.

AU - Grittner, N.

AU - Mehner, T.

AU - Nickel, D.

AU - Schaper, M.

AU - Maier, H. J.

AU - Lampke, T.

N1 - Funding information: The authors acknowledge the financial support by the Deutsche Forschungsgemeinschaft (German Research Foundation) of the project ‘Verbundstrangpressen von Titan-Aluminium-Verbindungen’ (Bo 3125/10-1 and SCI1103/3-1) and in the collaborative research centre ‘High strength aluminium-based lightweight materials for safety components’ (DFG SFB 692). The authors are grateful to Andrea Sendzik, IWW—TU Chemnitz, for FIB preparation; Anne Schulze, IWW—TU Chemnitz, for TEM imaging; and to Dr. Shibayan Roy, Oak Ridge National Laboratory, for helpful discussion and valuable comments.

PY - 2013/12/24

Y1 - 2013/12/24

N2 - In the present study, the interfacial microstructure of dissimilar Al/Ti joints formed by a co-extrusion process has been investigated. The material combinations used for the experiments were commercially pure aluminium and titanium, respectively, in the alloys EN AW-6082 and TiAl6V4. X-ray diffraction, energy-dispersive X-ray spectroscopy, electron microscopy and electron backscatter diffraction revealed titanium aluminide formation in the interface, the development of deformation bands in the sleeve material, and the occurrence of grain size refinement and twinning in the core material. The results are discussed with respect to the concept of a hard core-soft sleeve co-extrusion comprising plastic deformation to promote solid-state diffusion. The study shows the phase distribution and the microstructural evolution in the bonding zone with the aim to improve the quality of the bonding by adequately adjusting the process parameters.

AB - In the present study, the interfacial microstructure of dissimilar Al/Ti joints formed by a co-extrusion process has been investigated. The material combinations used for the experiments were commercially pure aluminium and titanium, respectively, in the alloys EN AW-6082 and TiAl6V4. X-ray diffraction, energy-dispersive X-ray spectroscopy, electron microscopy and electron backscatter diffraction revealed titanium aluminide formation in the interface, the development of deformation bands in the sleeve material, and the occurrence of grain size refinement and twinning in the core material. The results are discussed with respect to the concept of a hard core-soft sleeve co-extrusion comprising plastic deformation to promote solid-state diffusion. The study shows the phase distribution and the microstructural evolution in the bonding zone with the aim to improve the quality of the bonding by adequately adjusting the process parameters.

UR - http://www.scopus.com/inward/record.url?scp=84893643305&partnerID=8YFLogxK

U2 - 10.1007/s10853-013-7912-6

DO - 10.1007/s10853-013-7912-6

M3 - Article

AN - SCOPUS:84893643305

VL - 49

SP - 2442

EP - 2455

JO - Journal of materials science

JF - Journal of materials science

SN - 0022-2461

IS - 6

ER -