Abnormal grain growth induced by sub-boundary-enhanced solid-state wetting: Analysis by phase-field model simulations

Abnormal grain growth (AGG) was approached by a new concept of sub-boundary-enhanced solid-state wetting using a phase-field model (PFM) simulation. If grains have sub-boundaries of very low-energy, they increase the probability of growing by solid-state wetting, compared with other grains of modera...

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Bibliographic Details
Published in:Acta materialia 2009-02, Vol.57 (3), p.838-845
Main Authors: Ko, Kyung-Jun, Cha, Pil-Ryung, Srolovitz, David, Hwang, Nong-Moon
Format: Article
Language:English
Subjects:
Abnormal grain growth
Anisotropy
Applied sciences
Computer simulation
Exact sciences and technology
Grain boundaries
Grain boundary wetting
Grain growth
Grains
Metals. Metallurgy
Phase-field models
Simulation
Three dimensional
Wetting
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Summary:Abnormal grain growth (AGG) was approached by a new concept of sub-boundary-enhanced solid-state wetting using a phase-field model (PFM) simulation. If grains have sub-boundaries of very low-energy, they increase the probability of growing by solid-state wetting, compared with other grains of moderate anisotropy in grain boundary energy. As a result, the grains with sub-boundaries have an exclusive growth advantage and can grow abnormally. These aspects are shown in two- and three-dimensional PFM simulations.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2008.10.030