Surface stress-induced structural reorientation and, pseudoelastic effect in Pd nanowires

Document Type

Conference Proceeding

Publication Date

9-18-2008

Abstract

Using molecular dynamics simulations we investigate the surface-stress-induced crystallographic reorientation and pseudoelastic behavior in Pd crystalline nanowires. For a 〈100〉 initial crystal orientation and wire cross-sectional area below 2.57 nm × 2.57 nm, our studies indicate that the surface stress can cause Pd nanowire to undergo spontaneous structural reorientation leading to a fee structures with 〈110〉 orientation. Under tensile loading and unloading Pd nanowires transform reversibly between the two crystallographic orientations exhibiting pseudoelastic behavior characterized by fully recoverable strains of up to 50%. The temperature-dependence of the pseudoelastic behavior enables the shape memory effect in Pd nanowires.

Publication Source (Journal or Book title)

TMS Annual Meeting

First Page

21

Last Page

28

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