Journal
SCRIPTA MATERIALIA
Volume 179, Issue -, Pages 30-35Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.01.006
Keywords
Compression test; Multilayers; Nanocrystalline materials; Plastic deformation; Sputtering
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11872380]
- Natural Science Foundation of Hunan Province [2019JJ50750]
- Project of State Key Laboratory of High Performance Complex Manufacturing [ZZYJKT2018-05]
- Opening fund of State Key Laboratory of Nonlinear Mechanics, China
- Alexander von Humboldt Foundation, Germany
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A topologically heterogeneous microstructure design is introduced in a Cu/Zr nanolayered composite, in which each soft 100 nm Cu or Zr layer is surrounded on both sides by several hard 10 nm Cu/Zr bilayers. This design aims to impose a full geometrical constraint on all of the soft layers. Micropillar compression tests demonstrate that the composite deforms in a compatible fashion among the layers, in which no extrusion of the soft layers occurs. An elevated strength of 730 MPa is achieved in the composite compared with the strength prediction based on the linear rule of mixtures. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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