期刊
SCRIPTA MATERIALIA
卷 139, 期 -, 页码 71-76出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.06.009
关键词
High entropy alloy films; Nanotwins; Deformation mechanism; Strain rate sensitivity
类别
资金
- National Natural Science Foundation of China [51621063, 51625103, 51571157]
- National Key Research and Development Program of China [2017YFB0702301]
- 111 Project of China [B06025]
- International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies
- National Science Fund
- China Postdoctoral Science Foundation [2016M590940, 2017T100744]
- Shaanxi Province Postdoctoral Scientific Research Projects
In this work, we investigate the plastic deformation characteristics (hardness, strain rate sensitivity and activation volume) of nanotwinned Al(x)cocrFeNi (x = 0, 0.1,03) high entropy alloy thin films (HEAFs). The extremely thin nanotwins with thickness of similar to 2 nm soften these HEAFs, but enhance their strain rate sensitivity. We combine the detwinning softening process with conventional strengthening mechanisms to elucidate the mechanical properties of AlxCoCrFeNi HEAFs. These findings provide deep insights into design strategies to explore the promising high entropy alloys, especially the nanotwinned HEAFs at micro- and nano-scale. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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