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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
Tamoghna Chakrabarti, Sukriti Manna 
Corresponding Authors:
Tamoghna Chakrabarti 
DOI #:
https://doi.org/10.1016/j.commatsci.2018.07.041 
Title:
Zener Pinning through Coherent Precipitates: A Phase Field Study 
Journal:
Computational Materials Science 
Year:
2018 
Volume:
154  
Page:
84–90 
Keywords:
Misfit, Coherent precipitate, Grain size, Phase-field, Zener pinning 
Abstract:
A novel phase field model has been developed to study the effect of coherent precipitate on the Zener pinning of matrix grain boundaries. The model accounts for misfit strain between precipitate and matrix as well as the elastic inhomogeneity and anisotropy between them. The results show that increase in elastic misfit, elastic inhomogeneity, and elastic anisotropy increases the coarsening rate of the precipitates. Increased coarsening of precipitates in turn decreases the pinning of grain boundaries. Therefore, increase in misfit strain, elastic inhomogeneity and anisotropy mostly negatively affect the Zener pinning through coherent precipitate. This study shows elastic anisotropy gives rise to the needle shape precipitate. It has also been shown that these needle shaped precipitates are not very effective in Zener pinning. This study provides an understanding into the effect of coherent precipitate on the Zener pinning of matrix grain boundaries. To design a material with smallest possible grain size, coherent precipitate with least lattice misfit and highest elastic modulus will be most effective. 
Entered by:
Venkata Dantham on 2020-08-04 
 
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