Grain size effects in the deformation of 0001 textured nanocrystalline Zr

CJ Ruestes and G Bertolino and M Ruda and D Farkas and EM Bringa, SCRIPTA MATERIALIA, 71, 9-12 (2014).

DOI: 10.1016/j.scriptamat.2013.09.010

Molecular dynamics was used to simulate tensile testing of columnar grain samples of nanocrystalline Zr with random rotations around the 0 0 0 1 axis. For grain sizes smaller than a critical size the results show an inverse Hall-Petch effect. For larger grains the calculated Hall Petch constant agrees well with the experimental data. Grain size effects on deformation mechanisms, including grain boundary sliding and dislocation emission, are also discussed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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