|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials Research in Reduced Gravity
||Growth Morphology and Velocity of Undercooled Fe-B Alloys under Different Fluid Flow Conditions
||Christian Karrasch, Thomas Volkmann, Matthias Kolbe, Jianrong Gao, Dieter M. Herlach
|On-Site Speaker (Planned)
The Fe-B system offers to study dendritic (Fe-1, 5, 10 at.% B) and eutectic solidification (Fe-17 at.% B). Electromagnetic levitation technique (EML) is used for containerless in-situ studies on deeply undercooled Fe-B melts. The transformation of the undercooled liquid into the solid leads to a visible contrast due to the release of latent heat during rapid solidification which is recorded by a high-speed video camera. Concerning terrestrial EML under 1g, the electro-magnetic field necessary for levitation induces strong convective fluid flow (0.3 m/s) inside the melt (electromagnetic stirring). In order to verify the influence of convection on the growth morphology (bent dendrites) and growth velocity, melt fluxing and parabolic flight experiments are carried out under reduced gravity conditions with reduced fluid flow velocity (0.05 m/s). This work is supported by the German Research Foundation DFG within contract HE1601/18 and by the European Space Agency ESA under contracts 4200020277 and 4200014980.
||Planned: A print-only volume