期刊
SCRIPTA MATERIALIA
卷 151, 期 -, 页码 53-56出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.03.036
关键词
Deformation mechanisms; Acoustic emission; Microscopy; Micro-mechanical testing
类别
资金
- State Assignment of the Ministry of Science and Education of Russia [N 11.5281.2017/8.9]
To gain a deeper insight into fundamental processes of localised plastic deformation, we propose a new strategy for micro-mechanical testing combining the micro-scale scratching and analysis of low amplitude acoustic emissions (AE) accompanying dynamic dislocation processes in solids. The analysis of the AE spectral density reveals its strong dependence on crystallographic orientations of the grains along the indenter path, thus reflecting the finest features of the local dislocation activity. Adding a temporal dimension with a sub-microsecond resolution, the proposed methodology substantially enhances the existing capacity of micro-mechanical testing and can be used in a wide range of testing schemes. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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