Pseudo-elasticity and ultra-high recoverable strain in cobalt nanowire: A molecular dynamics study
C Ni and H Ding and C Li and LT Kong and XJ Jin, SCRIPTA MATERIALIA, 68, 191-194 (2013).
Metallic nanowires show pseudo-elasticity with much higher recoverable strain (usually similar to 40-50%) than bulk shape memory alloys (similar to 8-10%). An ultra-high recoverable strain (similar to 71%) is revealed in hexagonal close-packed cobalt nanowires by our molecular dynamics simulations, realized via lattice reorientation between ((1) over bar(1) over bar 20) and ((1) over bar 100). The pseudo-elasticity is found to be relevant to the cross-section size and length of the nanowires, which dominates the competition between structural transformation and stacking fault formation which leads to different degrees of pseudo-elasticity. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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