TY - JOUR
T1 - Capturing slip band formation in Ni 3 Al nanocubes during compression
AU - Konstantinidis, Avraam A.
AU - Aifantis, Katerina E.
N1 - Funding Information: This work was initiated and partly supported from the European Research Council Starting Grant MINATRAN 211166. Funding Information: The authors acknowledge support from the European Union-RISE program, grant number 734485 ‘Fracture Across Scales and Materials, Processes and Disciplines/FRAMED’. Publisher Copyright: © 2019, © 2019 Institute of Materials, Minerals and Mining.
PY - 2019/3/24
Y1 - 2019/3/24
N2 - The intermittent plasticity, and stochastic size effect, observed experimentally during the compression of fibbed Ni 3 Al nanocubes are modelled by implementing gradient plasticity within a cellular automaton simulation. The simulation results are in agreement with the experimentally observed stress–displacement curves and can capture both their serrated and stochastic response. Analysing the simulation data allows for additional information to be obtained regarding the deformation mechanisms and microstructural changes during compression, such as the thickness of the individual localised slip zones that formed, as well as the total volume percentage that deformed plastically. Both of these length scales are shown to follow a size-dependent behaviour, suggesting that although the overall deformation may appear to be stochastic, the evolution of deformation still depends on the cube size.
AB - The intermittent plasticity, and stochastic size effect, observed experimentally during the compression of fibbed Ni 3 Al nanocubes are modelled by implementing gradient plasticity within a cellular automaton simulation. The simulation results are in agreement with the experimentally observed stress–displacement curves and can capture both their serrated and stochastic response. Analysing the simulation data allows for additional information to be obtained regarding the deformation mechanisms and microstructural changes during compression, such as the thickness of the individual localised slip zones that formed, as well as the total volume percentage that deformed plastically. Both of these length scales are shown to follow a size-dependent behaviour, suggesting that although the overall deformation may appear to be stochastic, the evolution of deformation still depends on the cube size.
KW - Nanocubes
KW - gradient plasticity
KW - localised slip zones
KW - stochasticity
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U2 - 10.1080/02670836.2019.1572688
DO - 10.1080/02670836.2019.1572688
M3 - Article
SN - 0267-0836
VL - 35
SP - 571
EP - 576
JO - Materials Science and Technology (United Kingdom)
JF - Materials Science and Technology (United Kingdom)
IS - 5
ER -