TITLE

Pseudoelastic behavior of Cu–Ni composite nanowires

AUTHOR(S)
Mastorakos, Ioannis N.; Zbib, Hussein M.; Bahr, David F.; Parsons, Jessica; Faisal, Mased
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigate the pseudoelastic behavior at room temperature of composite nanowires using molecular dynamics simulations. The nanowires are composed of a nickel core surrounded by a copper shell, leading to high coherency stresses. The coherency and surface stresses cause the nanowires to undergo a lattice reorientation, by twinning, from <001> to <110> during relaxation. Nanowires of different cross-sectional areas (varying from 2.17×2.17 up to 2.9×2.9 nm2) were studied. In all cases, under tensile loading, the nanowires reorient to <001> and then under unloading reorient back to <110>, thus exhibiting pseudoelastic behavior. This behavior is more pronounced in composite nanowires with a coherent interface than for single crystal nanowires.
ACCESSION #
36435032

 

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