<p>Rapid solidification is a well established method to produce novel materials with improved
mechanical or electrical properties. The sharp-interface kinetics of rapid solidification
for a binary alloy is summarized. A Phase Field model mapping to this sharp interface
model is summarized and solved by a new adaptive mesh refinement algorithm.
Simulation results are consistent with experiments: The solidification velocity increases
in power-law like fashion at low undercooling and approximately linearly at high undercooling;
The solid/liquid interface undergoes a transition from four-fold dendritic to circular
crystal structures; Solute trapping emerges and the solute partitioning approaches
unity as the solidification velocity increases. Our Phase Field simulations are the first self -consistent
predictions of velocity selection and morphological selection at both low and
high undercoolings and also the first independent check of the solute trapping model in two
dimensions.</p> / Thesis / Master of Applied Science (MASc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/21841 |
| Date | 08 1900 |
| Creators | Fan, Jun |
| Contributors | Provatas, Nikolas, Materials Science |
| Source Sets | McMaster University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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