期刊
SCRIPTA MATERIALIA
卷 59, 期 11, 页码 1210-1213出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.08.021
关键词
Metallic glasses; Hardness; Shear bands; Residual stresses
类别
资金
- National Natural Science Foundation of China [50425102, 50601021, 50701038, 60776014, 10702062]
- Zhejiang University-Helmholtz cooperation fund
- Ministry of Education of China
- Department of Science and Technology of Zhejiang province
- Zhejiang University
To uncover the influence of pre-existing/residual stress on the mechanical behavior of metallic glass, the micro-Vickers indentation of a stressed metallic glass was studied. The pre-existing stress was introduced by bending. The results show that the nominal hardness decreases with pre-existing tensile stress and increases with pre-existing compressive stress. The real hardness decreases with pre-existing tensile stress, but does not increase obviously with pre-existing compressive stress. The mechanism of the strong hardness dependence on stress was investigated using finite element analysis. The unexpected hardness dependence on pi-c-existing compressive stress is also discussed. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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