Paper Title:
Measuring and Modeling Grain, Grain Boundary and Grain Edge Average Curvature and their Application to Grain Growth
  Abstract

Alongside volume fraction, VV, and area per unit of volume, SV, the integral interface curvature per unit of volume, MV, or the average interface curvature, H, are important microstructural descriptors. For grain growth, the grain boundary curvature is of special importance because, in addition to its geometrical significance, it is also the driving force for boundary migration. Notwithstanding its importance, curvature has been seldom measured and utilized in the analysis of polycrystals. Geometrical models were derived for the average curvature of individual grains, of grain boundaries and of grain edges, as a function of the mean intercept length. These models show good agreement with curvature measurements in an Al-1mass%Mn alloy. Furthermore, this work shows how grain boundary curvature measurement can be applied to normal grain growth as well as to the effect of particles on grain boundary pinning.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
2530-2535
DOI
10.4028/www.scientific.net/MSF.539-543.2530
Citation
P. R. Rios, G.S. Fonseca, "Measuring and Modeling Grain, Grain Boundary and Grain Edge Average Curvature and their Application to Grain Growth", Materials Science Forum, Vols. 539-543, pp. 2530-2535, 2007
Online since
March 2007
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