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Title: Deformation behaviour of [001] oriented MgO using combined in-situ nano-indentation and micro-Laue diffraction

Abstract

Here, we report a coupled in-situ micro-Laue diffraction and nano-indentation experiment, with spatial and time resolution, to investigate the deformation mechanisms in [001]-oriented single crystal MgO. Crystal plasticity finite element modelling was applied to aid interpretation of the experimental observations of plasticity. The Laue spots showed both rotation and streaking upon indentation that is typically indicative of both elastic lattice rotation and plastic strain gradients respectively in the material. Multiple facets of streaking of the Laue peaks suggested plastic slip occurring on almost all the {101}-type slip planes oriented 45° to the sample surface with no indication of slip on the 90° {110} planes. Crystal plasticity modelling also supported these experimental observations. Owing to asymmetric slip beneath the indenter, as predicted by modelling results and observed through Laue analysis, sub-grains were found to nucleate with distinct misorientation. With cyclic loading, the mechanical hysteresis behaviour in MgO is revealed through the changing profiles of the Laue reflections, driven by reversal of plastic strain by the stored elastic energy. Crystal plasticity simulations have also shown explicitly that in subsequent loading cycles after first, the secondary slip system unloads completely elastically while some plastic strain of the primary slip reverses. Tracking the Lauemore » peak movement, a higher degree of lattice rotation was seen to occur in the material under the indent, which gradually decreased moving laterally away. With the progress of deformation, the full field elastic strain and rotation gradients were also constructed which showed opposite lattice rotations on either sides of the indent.« less

Authors:
ORCiD logo; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Engineering and Physical Sciences Research Council (EPSRC); Royal Academy of Engineering (United Kingdom)
OSTI Identifier:
1437807
Alternate Identifier(s):
OSTI ID: 1462747
Grant/Contract Number:  
AC02-06CH11357; EP/K028707/1; EP/K034332/1; AC02–05CH11231
Resource Type:
Published Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Name: Acta Materialia Journal Volume: 145 Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; MgO; deformation gradient; mechanical hysteresis; micro-Laue-diffraction; nano-indentation; plasticity

Citation Formats

Bhowmik, Ayan, Lee, Junyi, Britton, T. Ben, Liu, Wenjun, Jun, Tea-Sung, Sernicola, Giorgio, Karimpour, Morad, Balint, Daniel S., and Giuliani, Finn. Deformation behaviour of [001] oriented MgO using combined in-situ nano-indentation and micro-Laue diffraction. United States: N. p., 2017. Web. https://doi.org/10.1016/j.actamat.2017.12.002.
Bhowmik, Ayan, Lee, Junyi, Britton, T. Ben, Liu, Wenjun, Jun, Tea-Sung, Sernicola, Giorgio, Karimpour, Morad, Balint, Daniel S., & Giuliani, Finn. Deformation behaviour of [001] oriented MgO using combined in-situ nano-indentation and micro-Laue diffraction. United States. https://doi.org/10.1016/j.actamat.2017.12.002
Bhowmik, Ayan, Lee, Junyi, Britton, T. Ben, Liu, Wenjun, Jun, Tea-Sung, Sernicola, Giorgio, Karimpour, Morad, Balint, Daniel S., and Giuliani, Finn. Tue . "Deformation behaviour of [001] oriented MgO using combined in-situ nano-indentation and micro-Laue diffraction". United States. https://doi.org/10.1016/j.actamat.2017.12.002.
@article{osti_1437807,
title = {Deformation behaviour of [001] oriented MgO using combined in-situ nano-indentation and micro-Laue diffraction},
author = {Bhowmik, Ayan and Lee, Junyi and Britton, T. Ben and Liu, Wenjun and Jun, Tea-Sung and Sernicola, Giorgio and Karimpour, Morad and Balint, Daniel S. and Giuliani, Finn},
abstractNote = {Here, we report a coupled in-situ micro-Laue diffraction and nano-indentation experiment, with spatial and time resolution, to investigate the deformation mechanisms in [001]-oriented single crystal MgO. Crystal plasticity finite element modelling was applied to aid interpretation of the experimental observations of plasticity. The Laue spots showed both rotation and streaking upon indentation that is typically indicative of both elastic lattice rotation and plastic strain gradients respectively in the material. Multiple facets of streaking of the Laue peaks suggested plastic slip occurring on almost all the {101}-type slip planes oriented 45° to the sample surface with no indication of slip on the 90° {110} planes. Crystal plasticity modelling also supported these experimental observations. Owing to asymmetric slip beneath the indenter, as predicted by modelling results and observed through Laue analysis, sub-grains were found to nucleate with distinct misorientation. With cyclic loading, the mechanical hysteresis behaviour in MgO is revealed through the changing profiles of the Laue reflections, driven by reversal of plastic strain by the stored elastic energy. Crystal plasticity simulations have also shown explicitly that in subsequent loading cycles after first, the secondary slip system unloads completely elastically while some plastic strain of the primary slip reverses. Tracking the Laue peak movement, a higher degree of lattice rotation was seen to occur in the material under the indent, which gradually decreased moving laterally away. With the progress of deformation, the full field elastic strain and rotation gradients were also constructed which showed opposite lattice rotations on either sides of the indent.},
doi = {10.1016/j.actamat.2017.12.002},
journal = {Acta Materialia},
number = C,
volume = 145,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.actamat.2017.12.002

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