Quadrijunctions-stunted grain growth in duplex microstructure: A multiphase-field analysis

SCRIPTA MATERIALIA

卷:182

Article

Perumal, Ramanathan^1,2  Amos, P. G. Kubendran¹  Selzer, Michael^1,2  Nestler, Britta^1,2 

[1] KIT, IAM, CMS, Str Forum 7, D-76131 Karlsruhe, Germany

[2] Karlsruhe Univ Appl Sci, Inst Digital Mat Sci IDM, Moltkestr 30, D-76133 Karlsruhe, Germany

关键词: Quadrijunctions;    Quadruple-junctions;    Stunted grain growth;    Concurrent grain growth and coarsening;    Duplex microstructure;   

DOI  :  10.1016/j.scriptamat.2020.02.041

来源: Elsevier

【 摘 要 】

Influence of energetically-preferred quadrijunctions on the kinetics of grain growth in textured two-dimensional duplex-microstructure is investigated in this work. A multiphase-field approach, wherein individual grains are associated with the constituent phases of the microstructure, is adopted for the present study. Different forms of anisotropy, phase-dependent (E-alpha not equal E-beta) and -independent (E-alpha = E-beta), established by appropriately varying grain boundary energies are considered. While being consistent with the analytical predictions, and existing studies, the present investigation unravels that, irrespective of the nature of anisotropy, the kinetics of the microstructural evolution in duplex polycrystalline system linearly decreases with increase in the density of quadrijunctions. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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