Journal
SCRIPTA MATERIALIA
Volume 133, Issue -, Pages 1-4Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.01.032
Keywords
Fracture toughness; Nanostructured metals; Digital image correlation; Nanotwins; Crack tunneling
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Funding
- National Natural Science Foundation of China [51420105001, 51371171, 51471172, 51401211]
- Key Research Program of Frontier Sciences
- Chinese Academy of Sciences
- Natural Science Foundation of Jiangsu Province, China [BK20161498]
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A contactless video crack opening displacement gauging system based on digital image correlation technique was established to measure the load-line displacement of miniaturized fracture toughness samples precisely. The intrinsic fracture toughness and smoothly rising R-curve of bulk dynamic plastic deformation (DPD) Cu with nanotwin bundles embedded in nano-grained matrix were measured through elastic-plastic unloading compliance method using miniaturized side-grooved compact tension specimens. Nanotwin bundles exert positive bearings on enhancing the damage tolerance of the DPD Cu. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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