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Phys. Rev. Lett. 103, 105501 (2009) [4 pages]

Correlation between Critical Temperature and Strength of Small-Scale bcc Pillars

A. S. Schneider,1 D. Kaufmann,2 B. G. Clark,1,3 C. P. Frick,4 P. A. Gruber,5 R. Mönig,2 O. Kraft,2,5 and E. Arzt3,6
1Max Planck Institute for Metals Research, Heisenbergstrasse 3, 70569 Stuttgart, Germany
2Forschungszentrum Karlsruhe, Institut für Materialforschung II, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
3INM-Leibniz Institute for New Materials, Campus Building D2 2, 66123 Saarbrücken, Germany
4Mechanical Engineering Department, University of Wyoming, 1000 East University Avenue, Laramie, Wyoming 82071, USA
5Institut für Zuverlässigkeit von Bauteilen und Systemen, Universität Karlsruhe, Kaiserstrasse 12, 76131 Karlsruhe, Germany
6Saarland University, 66123 Saarbrücken, Germany
Received 4 May 2009; published 31 August 2009

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 Tc. This finding sheds new light on the phenomenon of small-scale plasticity in largely unexplored non-fcc metals.

©2009 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.103.105501
DOI: 10.1103/PhysRevLett.103.105501
PACS: 62.25.-g
  • 62.25.-g
    Mechanical properties of nanoscale systems
  • YEAR: 2009

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