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Metals 2017, 7(12), 547; https://doi.org/10.3390/met7120547

Detection of Capillary-Mediated Energy Fields on a Grain Boundary Groove: Solid–Liquid Interface Perturbations

1
Florida Institute of Technology, College of Engineering, 150 W. University Blvd, Melbourne, FL 32955, USA
2
School for Engineering of Matter, Transport and Energy, Arizona State University, 551 E. Tyler Mall, Tempe, AZ 85287, USA
*
Author to whom correspondence should be addressed.
Received: 29 September 2017 / Revised: 28 November 2017 / Accepted: 29 November 2017 / Published: 6 December 2017
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Abstract

Grain boundary grooves are common features on polycrystalline solid–liquid interfaces. Their local microstructure can be closely approximated as a “variational” groove, the theoretical profile for which is analyzed here for its Gibbs–Thomson thermo-potential distribution. The distribution of thermo-potentials for a variational groove exhibits gradients tangential to the solid–liquid interface. Energy fluxes stimulated by capillary-mediated tangential gradients are divergent and thus capable of redistributing energy on real or simulated grain boundary grooves. Moreover, the importance of such capillary-mediated energy fields on interfaces is their influence on stability and pattern formation dynamics. The capillary-mediated field expected to be present on a stationary grain boundary groove is verified quantitatively using the multiphase-field approach. Simulation and post-processing measurements fully corroborate the presence and intensity distribution of interfacial cooling, proving that thermodynamically-consistent numerical models already support, without any modification, capillary perturbation fields, the existence of which is currently overlooked in formulations of sharp interface dynamic models. View Full-Text
Keywords: interfaces; grain boundary grooves; capillarity; pattern formation; phase field measurements interfaces; grain boundary grooves; capillarity; pattern formation; phase field measurements
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Glicksman, M.; Ankit, K. Detection of Capillary-Mediated Energy Fields on a Grain Boundary Groove: Solid–Liquid Interface Perturbations. Metals 2017, 7, 547.

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