Accession Number : AD0614182

Title :   THERMAL CONVECTION DURING HORIZONTAL SOLIDIFICATION OF PURE METALS AND ALLOYS.

Descriptive Note : Revised ed.,

Corporate Author : TORONTO UNIV (ONTARIO)

Personal Author(s) : Cole,G. S. ; Winegard,W. C.

Report Date : 07 JAN 1964

Pagination or Media Count : 12

Abstract : Temperature fluctuations have been observed by sensitive thermocouples placed in intimate contact with the liquid during the horizontal and unidirectional solidification of pure metals and alloys. These fluctuations are caused by the presence of thermal convection in the liquid as the result of a temperature gradient. The amount of thermal convection is shown to be a function of the temperature gradient in the liquid, the rate of solidification, the height of the solid/liquid interface, the angle of deviation of the interface from the vertical plane, and the fluid parameters of the liquid metal. The presence of thermal convection during the horizontal growth of alloy crystals may affect the steady-state solute distribution in the liquid to cause macroscopic segregation. (Author)

Descriptors :   (*PHASE STUDIES, LIQUID METALS), (*METALS, CRYSTALLIZATION), (*ALLOYS, CRYSTALLIZATION), HEAT TRANSFER, SURFACE PROPERTIES, CRYSTAL GROWTH, BOUNDARY LAYER, PARTIAL DIFFERENTIAL EQUATIONS, TEMPERATURE, FREEZING

Distribution Statement : APPROVED FOR PUBLIC RELEASE