About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
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Presentation Title |
Changes in the Energy of the Grain Boundary Network during Grain Growth in Polycrystals |
Author(s) |
Zipeng Xu, Robert M. Suter, Gregory S. Rohrer |
On-Site Speaker (Planned) |
Zipeng Xu |
Abstract Scope |
In polycrystals, each grain boundary is connected to several neighboring grain boundaries within an interfacial network. Therefore, when grain boundaries migrate, there are changes in the areas and orientations of the connected boundaries. In this talk, based on high energy diffraction microscopy measurement of a large population of grain boundary faces (~ 60000) within three-dimensional polycrystals (α-Fe and Ni) evolving during grain growth, several grain boundary properties (migration velocity, curvature, energy) are described as a function of all five crystallographic parameters. Using experimentally measured grain boundary energies, together with functions interpolated from computed grain boundary energies, we examined how the grain boundary energies change as the grain boundary network evolves. We find that the areas of low energy grain boundaries tend to increase while the areas of high energy boundaries tend to decrease during grain growth. The observations imply that grain boundary energy anisotropy influences grain boundary migration. |