An intrinsic correlation between driving force and energy barrier upon grain boundary migration

Bo Lin, Kang Wang, Feng Liu, Yaohe Zhou

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The migration of grain boundary (GB), which plays a key role in the microstructural evolution of polycrystalline materials, remains mysterious due to the unknown relationship between GB mobility associated with specific geometry and external conditions (e.g. temperature, stress, etc., hence the thermodynamic driving force). Combining the rate equation of GB migration with molecular dynamics simulations, an intrinsic correlation between driving force and energy barrier for the migration of various types of GBs (i.e. twist, symmetric tilt, asymmetric tilt, and mixed twist-tilt) is herein explored, showing the decrease of energy barrier with increasing thermodynamic driving force.

Original languageEnglish
Pages (from-to)1359-1363
Number of pages5
JournalJournal of Materials Science and Technology
Volume34
Issue number8
DOIs
StatePublished - Aug 2018

Keywords

  • Grain boundary
  • Kinetics
  • Molecular dynamics
  • Thermodynamics

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