ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A modified cellular automaton model was proposed to simulate the dendrite growth ofalloy. Different from previous models, this model used neither an analytical equation(such as KGTmodel) nor an interface solute gradient equation to solve the velocity of solid-liquid interface, butused the interface solute and energy conservation and thermodynamic equilibrium condition todescribe the solid/liquid interface growth kinetics process. In present model, once the temperaturefield and solute field were solved by finite different method in the entire domain, the materialthermodynamic properties can be substituted into four algebraic equations to easily determine thevariation of solid fraction, interface temperature and solute concentration, instead of calculatinginterface moving velocity. As a result, the complexity of the calculation can be largely reduced. Thesimulated dendrite growth was in a good agreement with the Lipton–Glicksman–Kurz (LGK) modelfor free dendritic growth in undercooled melts
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.957.pdf
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