TY - CHAP
T1 - Microstructural origin of superior compressive ductility of a nanocrystalline metal
AU - Pan, Deng
AU - Kuwano, S.
AU - Fujita, T.
AU - Chen, M. W.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Ultra-large compressive plasticity at room temperature has recently been observed in electrodeposited nanocrystalline nickel (nc-Ni) under micro-scale compression (Pan, Kuwano, Fujita and Chen: Nano Lett. Vol. 7 (2007), p. 2108). With aid of a TEM sample preparation technique employing focused ion beam (FIB), TEM observations on deformed nc-Ni evidenced deformation-induced microstructural evolution of nc-Ni at a variety of strain levels: Whilst the deformation increases, substantial grain growth is uncovered in the nc-Ni. No apparent ex situ evidence of intragranular dislocation activities is found in the deformed sample. As thermal diffusion plays an insignificant role in the deformation in nc-Ni at room temperature (∼0.17Tm), this premium plasticity is achieved in accommodation with the grain-boundary-mediated deformation, with assistance of extensive grain growth that is mainly driven by high stresses at steady plastic flow.
AB - Ultra-large compressive plasticity at room temperature has recently been observed in electrodeposited nanocrystalline nickel (nc-Ni) under micro-scale compression (Pan, Kuwano, Fujita and Chen: Nano Lett. Vol. 7 (2007), p. 2108). With aid of a TEM sample preparation technique employing focused ion beam (FIB), TEM observations on deformed nc-Ni evidenced deformation-induced microstructural evolution of nc-Ni at a variety of strain levels: Whilst the deformation increases, substantial grain growth is uncovered in the nc-Ni. No apparent ex situ evidence of intragranular dislocation activities is found in the deformed sample. As thermal diffusion plays an insignificant role in the deformation in nc-Ni at room temperature (∼0.17Tm), this premium plasticity is achieved in accommodation with the grain-boundary-mediated deformation, with assistance of extensive grain growth that is mainly driven by high stresses at steady plastic flow.
KW - Compressive ductility
KW - Deformation
KW - Microstructure
KW - Nanocrystalline metal
UR - http://www.scopus.com/inward/record.url?scp=75849118832&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/MSF.633-634.73
DO - 10.4028/www.scientific.net/MSF.633-634.73
M3 - Chapter
AN - SCOPUS:75849118832
SN - 0878493050
SN - 9780878493050
T3 - Materials Science Forum
SP - 73
EP - 84
BT - Ductility of Bulk Nanostructured Materials
PB - Trans Tech Publications Ltd
ER -