Statistical heterogeneity of plastic deformation: An investigation based on surface profilometry
Schwerdtfeger J, Nadgorny E, Koutsos V, Blackford JR, Zaiser M (2010)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2010
Journal
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Book Volume: 58
Pages Range: 4859-4870
Journal Issue: 14
DOI: 10.1016/j.actamat.2010.05.024
Abstract
The present paper investigates the intrinsic spatial heterogeneity of plastic deformation of crystalline materials by analysing surface profiles recorded by atomic force microscopy and scanning white light interferometry. Profiles were recorded before and after compressive deformation of three types of alkali halide single crystals: as-grown (AG) KCl and LiF and irradiated (IR) LiF. The profiles were characterized in terms of their height-height correlation function and scale-dependent roughness. We also investigated the statistics of surface step heights and found scale-free distributions over about three orders of magnitude in step (nm to mu m) in the AG crystals. A different picture was observed in IR LiF at low plastic strains, where we could identify well-defined characteristic step heights. We discuss these findings in terms of slip avalanches caused by collective motion of dislocations. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors with CRIS profile
Jan Schwerdtfeger
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM)
Michael Zaiser
Lehrstuhl für Werkstoffsimulation
Additional Organisation(s)
Involved external institutions
Michigan Technological University
United States (USA) (US)
University of Edinburgh
United Kingdom (GB)
United States (USA) (US)
University of Edinburgh
United Kingdom (GB)
How to cite
APA:
Schwerdtfeger, J., Nadgorny, E., Koutsos, V., Blackford, J.R., & Zaiser, M. (2010). Statistical heterogeneity of plastic deformation: An investigation based on surface profilometry. Acta Materialia, 58(14), 4859-4870. https://doi.org/10.1016/j.actamat.2010.05.024
MLA:
Schwerdtfeger, Jan, et al. "Statistical heterogeneity of plastic deformation: An investigation based on surface profilometry." Acta Materialia 58.14 (2010): 4859-4870.
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