Pseudoelastic behavior of Cu-Ni composite nanowires
- School of Mechanical and Materials Engineering, Washington State University, Pullman Washington 99164 (United States)
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 2.17x2.17 up to 2.9x2.9 nm{sup 2}) 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.
- OSTI ID:
- 21175933
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 94; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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