Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 543, Issue -, Pages 117-120Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.02.056
Keywords
Ultrafine-grained materials; Grain boundary sliding; Wetted boundaries; Strain rate sensitivity; Micro and nanoindentation
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Funding
- Hungarian Scientific Research Fund (OTKA) [K81360, K67692]
- Russian Foundation for Basic Research [10-02-00086, 11-08-90439]
- Russian Ministry for Education and Science
- National Science Foundation of the United States [DMR-0855009]
- European Research Council [267464-SPDMETALS]
- European Union [TAMOP 4.2.1./B-09/1/KMR-2010-0003]
- European Social Fund [TAMOP 4.2.1./B-09/1/KMR-2010-0003]
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The characteristics of plastic deformation of an ultrafine-grained (UFG) Al-30 wt.% Zn alloy were investigated using depth-sensing micro- and nanoindentation. Emphasis was placed on the effects of grain boundaries and the unusually high strain rate sensitivity. It is shown that there is a close relationship between enhanced strain rate sensitivity and ductility in this UFG material and this is associated with grain boundary sliding and enhanced diffusion along the Al/Al grain boundaries which appear to be wetted by Zn-rich layers. (C) 2012 Elsevier B.V. All rights reserved.
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