A phase-field model for phase transformations in glass-forming alloys

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2012-03-24
Authors
Wang, Tao
Napolitano, Ralph
Napolitano, Ralph
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Materials Science and Engineering
Abstract

A phase-field model is proposed for phase transformations in glass-forming alloys. The glass transition is introduced as a structural relaxation, and the competition between the glass and crystalline phases is investigated. The simulations are performed for Cu-Zr alloys, employing thermodynamic and kinetic parameters derived from reported thermodynamic modeling and molecular dynamics simulation results,[1–3] respectively. Four distinct phase fields are treated with a multi-phase-field approach, representing the liquid/glass, Cu10Zr7, CuZr, and CuZr2 phases. In addition, a continuum-field method is applied to the liquid to accommodate the liquid–glass transformation. The combined phase-field approach is used to investigate the glass formation tendency, and critical cooling rates are estimated and compared with the reported experimental values.

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This article is from Metallurgical and Materials Transactions A 43 (2012): 2662, doi:10.1007/s11661-012-1136-2. Posted with permission.

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