Modelling of the Influence of the Grain Size Distribution on the Grain Growth in Nanocrystals

Tomasz Wejrzanowski ,  Krzysztof J. Kurzydlowski 

Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland

Abstract

The paper presents results of grain growth modelling in single-phase polycrystalline materials based on the Hillert mean filed theory [1]. For the context of grain growth in nano-polycrystals this theory has been modified to take into account transient states and the effect of grain size distribution on the kinetics of the grain growth. Both, global and local mean size of grains as well as effect of spatial fluctuations in the size of grains has been studied.
The results show that the structure homogeneity and the mobility of the grain boundaries have a significant impact on the grain growth process. Relevance of the results to the processes taking place in some examples of nano-metals [2-4] is discussed.


1. M. Hillert. On the theory of normal and abnormal grain growth. Acta metal. 13, 1965, 227.
2. Z. Huda, B. Ralph. Kinetics of Grain Growth in Powder-formed IN-792: A Nickel-Base Superalloy. Materials Characterization, 25, 1990, 211-220.
3. M. A. Fortes. Grain growth kinetics: The grain growth exponent. Materials Science Forum Vols. 94-96, 1992, 319-324.
4. T. Sakuma, Y. Yoshizawa. The grain growth of zirconia during annealing in the cubic/tetragonal two-phase region. Materials Science Forum Vols. 94-96, 1992, 865-870.

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Presentation: poster at E-MRS Fall Meeting 2003, Symposium G, by Tomasz Wejrzanowski
See On-line Journal of E-MRS Fall Meeting 2003

Submitted: 2003-08-12 15:50
Revised:   2003-08-12 15:55
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