|About this Abstract
||Materials Science & Technology 2011
||Interfaces, Grain Boundaries and Surfaces from Atomistic and Macroscopic Approaches -- Fundamental and Engineering Issues
||Evolution of the Grain Boundary Character Distribution in 3D Grain Coarsening Observed with Non-Destructive High Energy X-ray Diffraction Microscopy
||C.M. Hefferan, S. F. Li, J. Lind, A. D. Rollett, U. Lienert, R. M. Suter
|On-Site Speaker (Planned)
We present the evolution of grain and grain boundary statistics obtained from a volume of high purity nickel microstructure. The sample underwent differential annealing so that properties and individual grains can be smoothly traced between states. The five parameter grain boundary character distribution (GBCD) evolves during coarsening, showing a growing relative population of twin boundaries, as expected. Twins and other special boundary types exhibit sharp GBCD peaks. We describe the microscopic boundary motions that lead to changes in the GBCD, with data collected at the Advanced Photon Source using High Energy X-ray Diffraction Microscopy (HEDM) and reconstructed with forward modeling software. Smoothed boundary meshes are used to characterize boundary type populations. This work is supported by the NSF Metals and Nanostructures program under grant DMR-0805100; SFL and JL are supported by DOE/BES contract number DESC0002001. Use of the Advanced Photon Source is supported by DOE/BES under Contract No. DE-AC02-06CH11357.
||Definite: A CD-only volume