Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 2015 | Published
Journal Article Open

Slip statistics of dislocation avalanches under different loading modes

Abstract

Slowly compressed microcrystals deform via intermittent slip events, observed as displacement jumps or stress drops. Experiments often use one of two loading modes: an increasing applied stress (stress driven, soft), or a constant strain rate (strain driven, hard). In this work we experimentally test the influence of the deformation loading conditions on the scaling behavior of slip events. It is found that these common deformation modes strongly affect time series properties, but not the scaling behavior of the slip statistics when analyzed with a mean-field model. With increasing plastic strain, the slip events are found to be smaller and more frequent when strain driven, and the slip-size distributions obtained for both drives collapse onto the same scaling function with the same exponents. The experimental results agree with the predictions of the used mean-field model, linking the slip behavior under different loading modes.

Additional Information

© 2015 American Physical Society. Received 12 May 2014; revised manuscript received 28 October 2014; published 14 April 2015. The authors thank James Antonaglia, P. M. Derlet, and Nir Friedman for fruitful discussions. The authors thank the SURF program at Caltech for providing funding and the opportunity to contribute to this project. R.M. is grateful for the financial support of the Alexander von Humboldt Foundation during his stay at Caltech, as well as to his host G. M. Pharr. J.R.G. is thankful for the financial support of the Office of Naval Research (ONR Grant No. N000140910883). K.A.D. thanks MGA and NSF for funding through NSF Grant No. DMR 1005209 and NSF Grant No. DMS1069224, and the Kavli Institute of Theoretical Physics (KITP) at UCSB for hospitality and support through Grant No. NSF PHY11-25915.

Attached Files

Published - PhysRevE.91.042403.pdf

Files

PhysRevE.91.042403.pdf
Files (1.8 MB)
Name Size Download all
md5:1749f927c4602ebf23fd460c1e81867b
1.8 MB Preview Download

Additional details

Created:
August 20, 2023
Modified:
October 23, 2023