Effect of anisotropic interfacial energy on grain boundary distributions during grain growth
- Jason A.
- Denise C.
- Andrew P.
- Anthony D.
Through simulations with the moving finite element program GRAIN3D, we have studied the effect of anisotropic grain boundary energy on the distribution of boundary types in a polycrystal during normal grain growth. An energy function similar to that hypothesized for magnesia was used, and the simulated grain boundary distributions were found to agree well with measured distributions. The simulated results suggest that initially random microstructures develop nearly steady state grain boundary distributions that have local maxima and minima corresponding to local minima and maxima, respectively, of the energy function. It is well known that the properties and area fractions of various grain boundary types in polycrystals have a dramatic effect on macroscopic materials properties. The goal of the present study is to examine the quantitative relation between grain boundary energies and the distribution of grain boundary types that result from grain growth. In keeping with the prior work, we parameterize the five-dimensional space of grain boundary types using three parameters to describe the lattice misorientation and two parameters to describe the orientation of the grain boundary plane. Of particular interest is the observation that at fixed misorientations, there is significant texture in the distribution of the grain boundary planes and planes with low surface energies appear more frequently. Here we use simulation to test the idea that the observed distributions arise because of the grain boundary energy anisotropy. In comparison to the experiments, the simulations are advantageous because they make it possible to monitor the time evolution of the distribution and to independently determine the influence of different grain boundary properties on the development of the distribution. A moving finite element program, GRAIN3D, has been developed with the capability to incorporate anisotropic grain boundary energy and mobility functions into grain growth simulations. We have modified the GRAIN3D code to simulate grain growth with anisotropic grain boundary energy and isotropic mobility.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 977783
- Report Number(s):
- LA-UR-04-5218; TRN: US201012%%537
- Resource Relation:
- Journal Volume: 467-470; Conference: Submitted to: 2nd International Conference on Recrystallization and Grain Growth, Aug. 30, 2004-Sept. 3, 2004, Annecy, France
- Country of Publication:
- United States
- Language:
- English
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