期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 128, 期 -, 页码 207-222出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2016.11.027
关键词
Molecular-dynamics; Grain reconstruction; Post-processing; Parallelization; Grain growth; Grain rotation
资金
- Deutsche Forschungsgemeinschaft (DFG) [GO 335/44-1]
- RWTH-Aachen University [RWTH0060]
Grain growth in nanocrystalline Al was studied by means of molecular dynamics simulations. The novelty of this study results from the utilization of an algorithm to resolve per-grain kinetics and orientation change from molecular dynamics data sets. To this aim, a highly efficient algorithm for the identification and reconstruction of crystallites from molecular dynamics data sets of FCC materials was developed. This method is capable of calculating specific attributes of grains, namely, volume, center of mass, average orientation and orientation spread. In addition, it provides a mapping method to track grains during time-row data sets. In the present contribution, we describe and validate the algorithm, which is then used to analyze grain growth in polycrystalline Al with a weak texture. For the conditions tested, the algorithm was able to find all of the input orientations and reconstruct the grains according to their crys-tallographic orientation. With the help of the developed algorithms, we studied grain growth kinetics and grain rotation. The results of the simulations showed slightly slowed-down kinetics in particular in the initial stages of grain growth and marginal rotation of the grains. (C) 2016 Elsevier B.V. All rights reserved.
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