Journal
SCRIPTA MATERIALIA
Volume 134, Issue -, Pages 95-99Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.03.003
Keywords
Plastic deformation; Grain boundary migration; Nanocrystalline metal; In situ; Transmission electron microscopy (TEM)
Categories
Funding
- Key Project of C-NSF [11234011]
- CNSF [11374030, 11327901, 11127404]
- Beijing Nova Program, China [Z1511000003150142]
- Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality [IDHT20140504]
- Beijing and Beijing 211 Project [PXM201101420409000053]
- Fok Ying-Tong Education Foundation of China [151006]
- Australian Research Council [DE150101212]
- Australian Research Council [DE150101212] Funding Source: Australian Research Council
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In this study, the plastic behaviors of nanocrystalline Au with an average grain size of 18 nm were investigated in situ using a home-made tensile device in a transmission electron microscope. We provide the direct experimental results revealed the process of grain boundary migration. The results show that dislocation behaviors are prevalent for large grains. However, for grain sizes below similar to 15 nm, grain boundary migration occurs frequently. The results of our statistical analyses show that grain boundary migration occurs more frequently than grain boundary sliding and rotation in nanocrystalline Au. (c) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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