|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Nanocomposites V: Structure-Property Relationships in Nanostructured Materials
||Probing the Effects of Composition and Morphology on the Mechanical Properties of Nanocomposites Made via Liquid Metal Dealloying
||Ian McCue, Bernard Gaskey, Michael Demkowicz, Jonah Erlebacher
|On-Site Speaker (Planned)
Dealloying has emerged as a promising route to fabricate nanostructured metallic materials for structural applications. Previous studies have largely focused on the mechanical response of dealloyed materials as a function of averaged properties, e.g. relative density and feature size. However, the composition of individual microstructural features in these materials can vary significantly, resulting in point-to-point differences in elastic moduli and hardness of as much as a factor of five. Here, we use nanoindentation to probe the mechanical properties of dealloyed composites at length scales smaller than their characteristic feature size and over wide areas of sample surface. Through the analysis of several thousand indents, we correlate variances in the hardness and elastic modulus directly with the local microstructure morphology and composition of the material. This work identifies how the properties of individual features convolve into macroscopic mechanical behavior, providing a framework to further tailor the mechanical properties of dealloyed materials.
||Planned: Supplemental Proceedings volume