Two modes of grain boundary pinning by coherent precipitates

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

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

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 (US)
Pages (from-to)226-232
Number of pages7
JournalActa Materialia
Volume135
DOIs
StatePublished - Aug 15 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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