4.7 Article

Effect of a high angle grain boundary on deformation behavior of Al nanopillars

Journal

SCRIPTA MATERIALIA
Volume 107, Issue -, Pages 5-9

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.05.005

Keywords

Aluminum; Bicrystal pillar; In situ TEM; MD simulation; Single-armed source

Funding

  1. National Research Foundation of Korea (NRF) [2014R1A4A1003712]
  2. Korean Research Council for Industrial Science and Technology [SC1100]
  3. National Research Foundation of Korea [NRF-2011-0029406, NRF-2012K2A1A9054818]
  4. National Research Council of Science & Technology (NST), Republic of Korea [SC1100] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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The effect of inclusion of a grain boundary in nanopillar was studied using Al bicrystal with [3 43]/[13 (17) over bar 14] orientation. Ex situ compression results showed higher strengths in bicrystal pillars than in single crystal pillars, which is explained with respect to the reduced single-armed source length that was confirmed in the in situ TEM tests. Molecular dynamics simulations indicated that the grain boundary can assist in dislocation nucleations without resulting in dislocation pile-up at the boundary. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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