期刊
SCRIPTA MATERIALIA
卷 57, 期 5, 页码 397-400出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.05.010
关键词
compression test; metal and alloys; plastic deformation; yield phenomena; nanoindentation
Single-crystal micro-pillars of a molybdenum alloy were prepared by a new technique that involves chemically etching away the matrix of a directionally solidified NiAl-Mo eutectic. The square cross-section pillars had edge dimensions ranging from similar to 360 to similar to 1000 nm. When tested in compression with a nanoindentation system, the pillars all yielded, regardless of size, at a critical resolved shear stress of 4.3 GPa, or G/26, where G is the shear modulus. This shear yield strength is in the range expected for the theoretical strength, G/30 to G/10. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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