Computer simulation of grain growth kinetics with solute drag

D. Fan, S. P. Chen, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The effects of solute drag on grain growth kinetics were studied in two-dimensional (2D) computer simulations by using a diffuse-interface field model. It is shown that, in the low velocity/low driving force regime, the velocity of a grain boundary motion departs from a linear relation with driving force (curvature) with solute drag. The nonlinear relation of migration velocity and driving force comes from the dependence of grain boundary energy and width on the curvature. The growth exponent m of power growth law for a polycrystalline system is affected by the segregation of solutes to grain boundaries. With the solute drag, the growth exponent m can take any value between 2 and 3, depending on the ratio of lattice diffusion to grain boundary mobility. The grain size and topological distributions are unaffected by solute drag, which are the same as those in a pure system.

Original languageEnglish (US)
Pages (from-to)1113-1123
Number of pages11
JournalJournal of Materials Research
Volume14
Issue number3
DOIs
StatePublished - Mar 1999

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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