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REVIEW ARTICLES: Solidification

Effects of Anisotropy Properties on Interface Pattern Formation

[+] Author and Article Information
R. Trivedi

Ames Laboratory, U.S. Department of Energy and the Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA

Appl. Mech. Rev 43(5S), S79-S84 (May 01, 1990) doi:10.1115/1.3120856 History: Online April 30, 2009

Abstract

The anisotropy in interfacial energy and interface kinetics significantly influence the interface patterns that develop when an alloy is directionally solidified beyond the threshold of the planar interface stability condition. These anisotropy effects not only influence the planar to cellular and cellular to dendritic transitions, but they also cause tilting of cells and dendrites with respect to the heat flow direction. The extent of tilt depends upon the velocity as well the crystal orientation at the interface. Experimental studies on pattern formation in anisotropic materials are presented, and these results are compared with the linear and weakly nonlinear analyses of the planar interface stability.

Copyright © 1990 by American Society of Mechanical Engineers
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