Paper Title:
Statistical Model of Grain Growth in Polycrystalline Nanomaterials
  Abstract

Nanomaterials, due to their fine grain sizes, exhibit enhanced mechanical properties. However, their low stability at also relatively low temperatures might limit their future applications. In the present work, a statistical model has been proposed in order to study grain growth processes in nanomaterials. The Hillert’s approach has been extended by incorporating two mechanisms of growth for an individual grain: grain boundary migration – GBM - (diffusion based - continuous) and grain-rotation coalescence – GRC - (discontinuous). The influence of the grain size distribution on the grain growth process has been studied. The results show that the inclusion of GRC mechanisms results in a departure from the parabolic law of grain growth. Such a deviation has also been observed experimentally, especially in nanomaterials. The results reveal that grain growth rate increases with higher dispersion of the fine grains and the rotation mechanism can initiate growth even with low dispersion. This causes a steady increase in the coefficient of variation which, after some time interval, decays to homogeneity. This paper also demonstrates that the average rotation mobility which is a consequence of the varying misorientation angle contributes up to about 50% of the overall average boundary mobility.

  Info
Periodical
Solid State Phenomena (Volume 129)
Edited by
R. Kozubski, G.E. Murch and P. Zięba
Pages
157-163
DOI
10.4028/www.scientific.net/SSP.129.157
Citation
T.B. Tengen, T. Wejrzanowski, R. Iwankiewicz, K. J. Kurzydłowski, "Statistical Model of Grain Growth in Polycrystalline Nanomaterials ", Solid State Phenomena, Vol. 129, pp. 157-163, 2007
Online since
November 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: G.M. Pennock, M.R. Drury, C.J. Spiers
Abstract:NaCl is plastically anisotropic and forms a well developed substructure during deformation at 0.3-0.5Tm. EBSD was used to assess subgrain...
597
Authors: Vera G. Sursaeva
Abstract:When a bicrystal or polycrystal are subjected to a change in temperature, the individual responses of the two adjoining crystals may differ...
801
Authors: S.J. Yao, Lin Xiu Du, Xiang Hua Liu, Guo Dong Wang
Abstract:Generally, three typical behaviors are recognized in hot-deformation of austenite. However, considering that those austenite grains involved...
657
Authors: Hiromi Miura, Masato Watanabe, Takashi Shirai, Akihiko Ishibashi
Abstract:Dynamic recrystallization (DRX) behavior in a Cu-0.65Sn-0.025P (mass%) alloy (Cu-Sn-P), which had been newly developed for high strength...
1267
Authors: Yong Wang, Shou Ren Wang, Ru Ma, Li Ying Yang
Chapter 1: Materials Properties
Abstract:Using optical microscopy, electron backscatter diffraction and transmission electron microscopy, the static recrystallization (SRX)...
730