Phase field study of the effect of grain boundary energy anisotropy on grain growth

The microstructure of a material determines its mechanical properties. Since microstructure can be tailored by thermo-mechanical processing of the metal, it is important to understand how the microstructure evolves under thermo-mechanical processing. We have constructed a phase field formalism to study recrystallization and grain growth in polycrystalline material. A unique feature of our model is that the Euler Angles (φ1,φ,φ2), obtained from Electron Back Scattered Diffraction (EBSD) data of a polycrystalline sample can be taken as an input to our model. In our model, the grain orientations at discrete grid points are represented by a non-conserved vector field, namely a quaternion. The free energy used for the evolution of the local orientations contains bulk energy for various preferred grain types and grain boundary energy. The grain orientations evolve in time following a Langevin dynamics. So far we have established that the rate of grain growth follows the usual L ~ t1/2scaling law when the grain boundary energy is independent of the misorientation angle between neighboring grains. Work on other aspects of this model is in progress.

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Effect of grain boundary energy anisotropy on highly textured grain structures studied by phase-field simulations

Acta Materialia ◽

10.1016/j.actamat.2013.10.058 ◽

2014 ◽

Vol 64 ◽

pp. 443-454 ◽

Cited By ~ 31

Author(s):

Kunok Chang ◽

Nele Moelans

Keyword(s):

Grain Boundary ◽

Phase Field ◽

Boundary Energy ◽

Grain Boundary Energy ◽

Grain Structures ◽

Energy Anisotropy

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Phase Field Model Simulation of Grain Growth in Three Dimensions under Isotropic and Anisotropic Grain Boundary Energy Conditions

Materials Science Forum - Recrystallization and Grain Growth III ◽

10.4028/0-87849-443-x.1101 ◽

2007 ◽

pp. 1101-1106

Author(s):

Kyung Jun Ko ◽

Pil Ryung Cha ◽

Jong Tae Park ◽

Jae Kwan Kim ◽

Nong Moon Hwang

Keyword(s):

Grain Boundary ◽

Grain Growth ◽

Phase Field ◽

Field Model ◽

Model Simulation ◽

Boundary Energy ◽

Phase Field Model ◽

Three Dimensions ◽

Energy Conditions ◽

Grain Boundary Energy

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Effect of Grain Boundary Energy in Recrystallization Simulation by Phase Field Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.993.953 ◽

2020 ◽

Vol 993 ◽

pp. 953-958

Author(s):

Yan Wu ◽

Ren Chuang Yan ◽

Er Wei Qin ◽

Wei Dong Chen

Keyword(s):

Grain Size ◽

Grain Boundary ◽

Grain Growth ◽

Phase Field ◽

Boundary Energy ◽

Phase Field Model ◽

Field Method ◽

Phase Field Method ◽

Grain Boundary Energy ◽

Average Grain Size

In this paper, the effect of grain boundary energy in AZ31 Mg alloy with multi-order parameters phenomenological phase field model has been discussed during the progress of recrystallization. The average grain size of the recrystallization grain at a certain temperature and a certain restored energy but various grain boundary energies have been studied, and the simulated results show that the larger the grain boundary energy is, the larger the average grain size will be, and the speed of grain growth will increase with the increase of grain boundary energy. Additionally, temperature will also increase the grain growth rate.

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