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A Phase Field Model of the Premelting of Grain Boundaries in Pure Materials

Published

Author(s)

A E. Lobkovsky, James A. Warren

Abstract

We present a phase field model of solidification which includes the effects of the crystalline orientation in the solid phase. This model describes grain boundaries as well as solid-liquid boundaries within a unified framework. With an appropriate choice of coupling of the phase field variable to the gradient of the crystalline orientation variable in the free energy, we find that high angle boundaries undergo a premelting transition. As the melting temperature is approached from below, low angle grain boundaries remain narrow. The width of the liquid layer at high angle grain boundaries diverges logarithmically.
Citation
A Phase Field Model of the Premelting of Grain Boundaries in Pure Materials
Volume
164
Issue
No. 3-4

Keywords

crystalline orientation, grain boundaries, melting, phase field model, pure materials, solid-liquid boundaries

Citation

Lobkovsky, A. and Warren, J. (2001), A Phase Field Model of the Premelting of Grain Boundaries in Pure Materials, A Phase Field Model of the Premelting of Grain Boundaries in Pure Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=853036 (Accessed May 21, 2024)

Issues

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Created December 31, 2000, Updated October 12, 2021