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Grain Boundary Sliding in Aluminum Nano-Bi-Crystals Deformed at Room Temperature

Aitken, Zachary H. and Jang, Dongchan and Weinberger, Christopher R. and Greer, Julia R. (2014) Grain Boundary Sliding in Aluminum Nano-Bi-Crystals Deformed at Room Temperature. Small, 10 (1). pp. 100-108. ISSN 1613-6810. doi:10.1002/smll.201301060.

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Room-temperature uniaxial compressions of 900-nm-diameter aluminum bi-crystals, each containing a high-angle grain boundary with a plane normal inclined at 24° to the loading direction, revealed frictional sliding along the boundary plane to be the dominant deformation mechanism. The top crystallite sheared off as a single unit in the course of compression instead of crystallographic slip and extensive dislocation activity, as would be expected. Compressive stress strain data of deforming nano bicrystals was continuous, in contrast to single crystalline nano structures that show a stochastic stress strain signature, and displayed a peak in stress at the elastic limit of ∼176 MPa followed by gradual softening and a plateau centered around ∼125 MPa. An energetics-based physical model, which may explain observed room-temperature grain boundary sliding, in presented, and observations are discussed within the framework of crystalline nano-plasticity and defect microstructure evolution.

Item Type:Article
Related URLs:
URLURL TypeDescription
Jang, Dongchan0000-0002-2814-9734
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2013 Wiley-VCH Verlag GmbH & Co. Revised: June 1, 2013; Article first published online: 19 Jul 2013; Manuscript Revised: 1 Jun 2013; Manuscript Received: 6 Apr 2013. The authors gratefully acknowledge the financial support of NSF through JRG’s CAREER Grant (DMR-1204864) and the Office of Naval Research (N000140910883). This research was supported in part by an appointment to the Sandia National Laboratories Truman Fellowship in National Security Science and Engineering, sponsored by Sandia Corporation (a wholly owned subsidiary of Lockheed Martin Corporation) as Operator of Sandia National Laboratories under its U.S. Department of Energy Contract No. DE-AC04-94AL85000. The authors also acknowledge the facilities and staff of the Kavli Nanoscience Institute at Caltech.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Office of Naval Research (ONR)N000140910883
Sandia National Laboratories Truman FellowshipUNSPECIFIED
Department of Energy (DOE) National Nuclear Security AdministrationDE-AC04-94AL85000
Subject Keywords:bicrystals; grain boundary; mechanical properties; nanopillar; aluminum
Issue or Number:1
Record Number:CaltechAUTHORS:20130726-075320969
Persistent URL:
Official Citation:Aitken, Z. H., Jang, D., Weinberger, C. R. and Greer, J. R. (2014), Grain Boundary Sliding in Aluminum Nano-Bi-Crystals Deformed at Room Temperature. Small, 10: 100–108. doi: 10.1002/smll.201301060
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39603
Deposited By: Tony Diaz
Deposited On:29 Jul 2013 21:54
Last Modified:09 Nov 2021 23:45

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