The Effects of Thermosolutal Convection on Macrosegregation during Alloy Solidification

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 25, Issue 10, 2001, pp.1337-1345
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.2001.25.10.1337

Title & Authors

The Effects of Thermosolutal Convection on Macrosegregation during Alloy Solidification

Lee, Gyun-Ho; Mok, Jin-Ho; Lee, Jin-Ho;

Lee, Gyun-Ho; Mok, Jin-Ho; Lee, Jin-Ho;

Abstract

Numerical investigation is made to study the effects of thermosolutal convection on the formation of macrosegregation in a Pb-Sn alloy solidification process in a two dimensional confined rectangluar mold. The basic equations are sovled using the Contrinum Model theory with the SIMPE algorithm during the solidification process. In addition, to track the liquid-solid interface with time variations, the moving boundary condition was adopted and moving irregular interface shapes were treated with the time-dependent, boundary-fitted coordinate system. As the temperature reduces from the liquidus to the solidus, the liquid concentration of Sn, the lighter constituent, increases. Then the buoyancy-driven flow due to temperature and liquid composition gradients occurs in the mushy region and forms the complicated macrosegregation maps. belated to this phenomena, effects on the macrosegregation formation depending on the cooling condition and gravity values are examined.

Keywords

Alloy Solidification;Macrosegregation;Continuum Model;SIMPLE Algorithm;Thermosolutal Convection;Gravitational Effect;

Language

Korean

Cited by

1.

A Study on Development of the Three-Dimensional Numerical Model to Analyze the Casting Process: Mold Filling and Solidification,Mok Jinho;

Journal of Mechanical Science and Technology, 2005. vol.19. 7, pp.1488-1502

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