Two modes of grain boundary pinning by coherent precipitates

Nan Wang*, Yanzhou Ji, Yongbiao Wang, Youhai Wen, Long Qing Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


We propose a two-mechanism theory to estimate the pinning effect of coherent precipitates on grain-boundary (GB) migration in grain growth, taking into account the important effect of elastic misfit strain at the coherent interface. Depending on the relative importance of the elastic and the GB contributions to the total free energy, Zener type stabilization or a novel elastic energy induced stabilization may occur. It is found that the pinning is most effective in the crossover region between these two mechanisms. A phase-field-crystal model is used to numerically validate the theory. Relevant experiments and potential impacts on alloy design are also discussed.

Original languageEnglish
Pages (from-to)226-232
Number of pages7
JournalActa Materialia
StatePublished - 15 Aug 2017
Externally publishedYes


  • Coherent precipitate
  • Grain boundary
  • Grain growth
  • Particle pinning
  • Phase-field-crystal model


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