Published January 26, 2009 | Version v1
Journal article Metadata-only

Pseudoelastic behavior of Cu-Ni composite nanowires

Creators

  • 1. School of Mechanical and Materials Engineering, Washington State University, Pullman Washington 99164 (United States)

Description

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 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

Additional details

Identifiers

DOI
10.1063/1.3073984;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
94
Journal Issue
4
Journal Page Range
p. 043104-043104.3
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40051312
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
COMPOSITE MATERIALS; COPPER; COPPER ALLOYS; ELASTICITY; MOLECULAR DYNAMICS METHOD; MONOCRYSTALS; NICKEL; NICKEL ALLOYS; QUANTUM WIRES; RESIDUAL STRESSES; TEMPERATURE RANGE 0273-0400 K; TWINNING
Descriptors DEC
ALLOYS; CALCULATION METHODS; CRYSTALS; ELEMENTS; MATERIALS; MECHANICAL PROPERTIES; METALS; NANOSTRUCTURES; STRESSES; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Notes
(c) 2009 American Institute of Physics