Journal
ACTA MATERIALIA
Volume 59, Issue 13, Pages 5250-5256Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.05.001
Keywords
Grain boundary energy; Grain boundary character; MD simulations; EBSD
Funding
- US Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- Department of Energy, Office of Basic Energy Sciences
- National Science Foundation [DMR-0520425]
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The grain boundary character distribution (GBCD) is a direct measurement that can be determined from a single planar section. Since the GBCD is inversely related to the grain boundary energy distribution, it offers a useful metric for validating grain boundary energy calculations. Comparisons between the measured GBCD and calculated energies for 388 grain boundaries in Al show that, for boundaries with a statistically reliable number of observations, including general, Sigma 3, Sigma 7, Sigma 11 and < 1 1 1 > twist boundaries, the GBCD and calculated grain boundary energy have weighted correlation coefficients of approximately 0.9, reproducing both qualitative and quantitative trends seen in simulations. GBCDs for Ni and Al are positively correlated, as predicted by simulation. By combining GBCD measurements with simulation results, we validate grain boundary energy simulations in both low and high stacking fault energy metals. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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