Abstract
The mechanical stability of nanoporous gold (np-Au) at various stages of thermal coarsening is studied via finite element analysis under volumetric compression using np-Au architectures imaged via X-ray nano-tomography. As the np-Au is coarsened thermally over ligament sizes ranging from 185 to 465 nm, the pore volume fraction is determinant for the mechanical stability of the coarsened np-Au, unlike the curvature and surface orientation of the ligaments. The computed Young's modulus and yield strength of the structures are compared with the Gibson-Ashby model. The geometry of the structures determines the locations where stress concentrations occur at the onset of yielding.
Original language | English (US) |
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Pages (from-to) | 96-99 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 115 |
DOIs | |
State | Published - Apr 1 2016 |
Keywords
- Coarsened nanoporous gold
- Finite element (FE) analysis
- Mechanical stability
- Surface characteristics
- Volume fraction
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys