Berlin 2012 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 4: Mechanical Properties I
MM 4.3: Talk
Monday, March 26, 2012, 10:45–11:00, H 0106
Accumulative roll bonding and differential speed rolling of ultra fine grained Al-Ti composites — •Jan Romberg1,2,3, Juliane Scharnweber4, Jens Freudenberger1,5, Hiroyuki Watanabe6, Tom Marr1,2, Carl-Georg Oetrel4, Werner Skrotzki4, and Ludwig Schultz1,2 — 1IFW Dresden, Institute for Metallic Materials, Dresden, Germany — 2Dresden University of Technology, Institute for Materials Science — 3Dresden University of Technology, ECEMP International Graduate School, Germany — 4Dresden University of Technology, Instute for Solid State Physics — 5Freiberg University of Technology, Institute of Materials Science, Freiberg, Germany — 6Osaka Munipial Technical Research Institute, Osaka, Freiberg
Roll bonding of aluminium and titanium sheets was performed accumulatively. Due to the differences in formability of the metals initially used necking of the titanium is observed. Hence this process would not be expected to generate sheets consisting of layers from titanium and aluminium with a homogeneous thickness. This study examines the conditions under which roll bonding of titanium and aluminium is feasible and how necking can be suppressed. The use of cold worked aluminium sheets and recrystallised titanium sheets enables accummulated roll bonding with up to four cycles and faultless deformation. In addition the potential of differential speed rolling with respect to increasing the ductility of the roll bonded metals is shown. Both processes were combined to assess the relationship between processing and properties of fine-grained laminar sheets from titanium and aluminium.