Application of Rapid Solidification Techniques to Aluminum Alloys
Technical rept. 1 Feb 1978-30 Jun 1979
ILLINOIS UNIV AT URBANA DEPT OF METALLURGY AND MINING ENGINEERING
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This program is being conducted for the purpose of developing a predictive model of heat flow and solidification for aluminum alloys produced under the high cooling rate conditions achievable in atomization and surface melting. It is a combined experimental and theoretical study of the relationship between the important solidification variables e.g. cooling rate, temperature gradients, interface shape and velocity, supercooling and transformation kinetics and the structure and microchemistry of rapidly solidified aluminum alloys. This report covers the theoretical aspects of the investigation to date. The first part addresses the solidification of spherical droplets subjected to high rates of heat extraction achievable in various atomization processes. The second part is concerned with the two-dimensional transient heat flow occuring during rapid surface melting and solidification of a bulk substrate subjected to a high intensity heat flux over a circular region on its bonding surface.
- Metallurgy and Metallography
- Fabrication Metallurgy