On the origin of the anomalous compliance of dealloying-derived nanoporous gold. (15th March 2017)

• Record Type: Journal Article
• Authors: Ngô, B.-N. D.; Roschning, B.; Albe, K.; Weissmüller, J.; Markmann, J.
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 74
• Page End: 77
• Publication Date: 2017-03-15
• Subjects: Nanoporous -- Molecular dynamics -- Finite element modeling -- Elasticity of nanomaterials -- Surface effects; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.11.006
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The origin of the anomalously compliant behavior of nanoporous gold is studied by comparing the elasticity obtained from molecular dynamics (MD) and finite element method (FEM) simulations. Both models yield a compliance, which is much higher than the predictions of the Gibson-Ashby scaling relation for metal foams and thus confirm the influence of other microstructural features besides the porosity. The linear elastic FEM simulation also yields a substantially stiffer response than the MD simulation, which reveals that nonlinear elastic behavior contributes decisively to the anomalous compliance of nanoporous gold at small structure size. Graphical Abstract: