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Phys Rev Lett. 2009 Sep 4;103(10):105501. Epub 2009 Aug 31.

Correlation between critical temperature and strength of small-scale bcc pillars.

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  • 1Max Planck Institute for Metals Research, Heisenbergstrasse 3, 70569 Stuttgart, Germany.

Abstract

Microcompression tests were performed on focused-ion-beam-machined micropillars of several body-centered-cubic metals (W, Mo, Ta, and Nb) at room temperature. The relationship between yield strength and pillar diameter as well as the deformation morphologies were found to correlate with a parameter specific for bcc metals, i.e., the critical temperature T(c). This finding sheds new light on the phenomenon of small-scale plasticity in largely unexplored non-fcc metals.

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