Detection of capillary-mediated energy fields on a grain boundary groove: Solid-liquid interface perturbations

Martin Glicksman, Kumar Ankit

Research output: Contribution to journalArticle

5 Scopus citations

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.

Original languageEnglish (US)
Article number547
JournalMetals
Volume7
Issue number12
DOIs
StatePublished - Dec 2017

Keywords

  • Capillarity
  • Grain boundary grooves
  • Interfaces
  • Pattern formation
  • Phase field measurements

ASJC Scopus subject areas

  • Materials Science(all)

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