Allgemeines Physikalisches Kolloquium im Wintersemester 2010/2011
Ort:    48149 Münster, Wilhelm-Klemm-Str. 10, IG I, HS 2,
Zeit:    Donnerstag, 04.11.2010 16:00 Uhr c.t.
Kolloquiums-Kaffee ab 15:45 Uhr vor dem Hörsaal

Materialphysik in Schwerelosigkeit - Materialdesign aus der Schmelze

Prof. Dr. Andreas Meyer, DLR Köln

Almost all industrially used alloys have been molten in some processing step, specifically in casting. Solidification from the melt leaves its fingerprints in the final material which in turn influence its properties like, e.g., strength and corrosion resistance.
The challenge in further developing processing techniques and materials is to move from the established trial-and-error approach to computer-assisted materials design. This is still hampered by an incomplete understanding of mechanisms involved and by a lack of available thermophysical property data. In order to further advance the field, a multi-scale and multidisciplinary approach is necessary, combining experimental and theoretical work with computer simulations on all length scales and finally simulating the finishing steps, such as near-net-shape casting. A key role in this development plays the understanding of the interplay of transport of mass in the melt with the microstructure evolution during solidification.
In this talk new advanced techniques for the measurement of properties of mass transport in multicomponent metallic melts are presented and the benefits of experiments under microgravity conditions in space are highlighted - including first results from measurements in the materials science laboratory aboard the international space station ISS, as well on parabolic flights and sounding rockets.

Einladender: Prof. Dr. G. Wilde