Yao, Xiangdong and Wang, Hao and He, B. and Zhou, X. (2005) Modeling of columnar-to-equiaxed transition in solidified Al-Si alloys. In: 5th Pacific Rim International Conference on Advanced Materials and Processing (PRICM 5), 2-5 Nov 2004, Beijing, China.
A Cellular-Automaton Finite-Volume-Method (CAFVM) algorithm has been developed, coupling with macroscopic model for heat transfer calculation and microscopic models for nucleation and growth. The solution equations have been solved to determine the time dependent constitutional undercooling and interface retardation during solidification. The constitutional undercooling is then coupled into the CAFVM algorithm to investigate both the effects of thermal and constitutional undercooling on columnar growth and crystal selection in the columnar zone, and formation of equiaxed crystals in the bulk liquid. The model cannot only simulate microstructures of alloys but also investigates nucleation mechanisms and growth kinetics of alloys solidified with various solute concentrations and solidification morphologies.
|Item Type:||Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)|
|Additional Information:||Author version not held.|
|Uncontrolled Keywords:||CAFVM; columnar equiaxed transition (CET); microstructure formation; modelling; solidification|
|Depositing User:||Ms Leslie Blay|
|Date Deposited:||13 May 2010 03:22|
|Last Modified:||16 Nov 2011 04:41|
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