Journal
SCRIPTA MATERIALIA
Volume 68, Issue 11, Pages 861-864Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.02.012
Keywords
Plastic deformation; Compression tests; Dislocations; Nanoindentation; Precipitation hardening
Categories
Funding
- Research Grants Council [7159/10E]
- University Grants Committee of the Hong Kong Special Administrative Region [SEG-HKU06]
- Kingboard Professorship Endowment
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Pure metal microspecimens have been found to exhibit strong size dependence of strength, but alloyed counterparts with a much refined microstructural length scale due to the precipitates present are as yet unknown. Here, compression tests on duralumin (aluminum 2025 alloy) micropillars reveal a much weaker size dependence of strength compared to pure Al, indicating the predominance of the internal length scale in determining strength. Creep is also significant in duralumin, probably due to the viscous overcoming of obstacles during deformation. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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