Affiliation:
1. Federal University of Technology Owerri
2. Federal University of Agriculture Abeokuta
Abstract
A numerical modeling of diffusion-controlled heat and specie transfer using a source base method to determine evolution of liquid/solid fraction from energy equation both for constant densities in the phases and variable densities as a function of temperature and concentration was developed to predict macro-solute redistribution in binary alloy system. From the results, it is observed that there was a solute depleted zone near the chill surface and that, the source base method can be effectively implemented without the need for setting a large arbitrary value in determining the derivative of liquid fraction-temperature function . The cooling curve and the liquid volume fraction versus temperature profile shows a smooth transition from fully liquid to mushy zone and then to fully solid state, hence, adequate handling of the jump discontinuity was ensured. The liquid fraction-temperature relation outlined in this work is suitable for tracking the liquid/solid interface.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Radiation
Reference20 articles.
1. S. Chang and D.M. Stefanescu, A Model for Macrosegregation and Its Application to Al-Cu Castings Metall. Trans. A 27A, (1996) 2708-2721.
2. Alan S. Morris, Reza Langari Measurement and Instrumentation, Theory and Application. Elsevier Inc. USA, 2012, pp.7-8.
3. M. C. Flemings and G. E. Nereo, MACROSEGREGATION. PT. 1, Trans. TMS-AIME 239 (1967)1449-1461.
4. M. C. Flemings, R. Mehrabian and G. E. Nereo, MACROSEGREGATION. PT. 2, Trans. TMS-AIME 242 (1968) 41-49.
5. C. Beckermann, Modelling of Macrosgregation: Applications and Future Needs, Int. Mat. Reviews 47 (2002) 243-261.
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献