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REVIEW ARTICLES: Solidification

Effects of Elastic Stress on the Stability of a Solid-Liquid Interface

[+] Author and Article Information
B. J. Spencer, S. H. Davis

Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL 60208, USA

G. B. McFadden

National Institute of Standards and Technology, Gaithersburg, MD 20899, USA

P. W. Voorhees

Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA

Appl. Mech. Rev 43(5S), S54-S55 (May 01, 1990) doi:10.1115/1.3120850 History: Online April 30, 2009

Abstract

The effects of elastic stress on the stability of solid-liquid interfaces under a variety of conditions are discussed. In the cases discussed, the nonuniform composition field in the solid, which accompanies either the melting process or the development of a perturbation on the solid-liquid interface during solidification, generates nonhydrostatic stresses in the solid. Such compositionally generated elastic stresses have been shown experimentally to induce a solidifying solid-liquid interface to become unstable. We are in the process of analyzing the effects of these stresses on the conditions for morphological stability of a directionally solidified binary alloy.

Copyright © 1990 by American Society of Mechanical Engineers
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