CaltechAUTHORS
Published August 30, 2012 | Version Supplemental Material + Published
Journal Article Open

Statistics of Dislocation Slip Avalanches in Nanosized Single Crystals Show Tuned Critical Behavior Predicted by a Simple Mean Field Model

Creators

  • 1. ROR icon University of Illinois Urbana-Champaign
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon Ulsan National Institute of Science and Technology

Abstract

We show that slowly sheared metallic nanocrystals deform via discrete strain bursts (slips), whose size distributions follow power laws with stress-dependent cutoffs. We show for the first time that plasticity reflects tuned criticality, by collapsing the stress-dependent slip-size distributions onto a predicted scaling function. Both power-law exponents and scaling function agree with mean-field theory predictions. Our study of 7 materials and 2 crystal structures, at various deformation rates, stresses, and crystal sizes down to 75 nm, attests to the universal characteristics of plasticity.

Additional Information

© 2012 American Physical Society. Received 6 December 2011; published 30 August 2012. We thank James Antonaglia, Braden Brinkman, Dennis Dimiduk, Tyler Earnest, Robert Maass, and Matthew Wraith for helpful conversations and acknowledge the financial support of NSERC (N. F.) and from grants NSF No. DMR 03-25939 ITR ("Materials Computation Center") and No. DMR 1005209 (G. T. and K. D.), as well as from NSF (A. T. J.), NSF CAREER Grant No. DMR-0748267 (J. R. G.), and ONR Grant No. N00014-09-1-0883 (J. R. G.). K. D. also thanks the Kavli Institute of Theoretical Physics at UC Santa Barbara for hospitality and support.

Attached Files

Published - PhysRevLett.109.095507.pdf

Supplemental Material - README.TXT

Supplemental Material - SupportingMaterials-4-7-2.pdf

Files

PhysRevLett.109.095507.pdf

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Additional details

Identifiers

Eprint ID
34802
Resolver ID
CaltechAUTHORS:20121010-070312238

Funding

Natural Sciences and Engineering Research Council of Canada (NSERC)
NSF
DMR 03-25939
NSF
DMR 1005209
NSF
DMR-0748267
Office of Naval Research (ONR)
N00014-09-1-0883
Kavli Institute for Theoretical Physics in Santa Barbara

Dates

Created
2012-10-10
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field