Characterizing individual ligaments' behavior during deformation of nanoporous (np) structures remains crucial in further understanding the mechanical response of such materials. In this paper, we report, for the first time, quantifiable results describing the reorientation of ligament structure in np gold (np-Au) subjected to nanoindentation, based on characterization by electron backscatter diffraction (EBSD) orientation mapping. The analysis was performed on a cross-sectioned face at the center of an indent, after specimen preparation utilizing focused ion beam (FIB) techniques. This work provides insights into how the np structure accommodates the material volume displaced during nanoindentation, as well as the strain propagation under the indent. This new knowledge will be fundamental to optimizing utilization of the nanoindentation technique for measurement of np materials and, in particular, np thin films.
|Number of pages||6|
|State||Published - 2018|
Bibliographical noteFunding Information:
The authors thank Tyler L. Maxwell for performing the indentation of nanoporous gold, and acknowledge support of the Electron Microscopy Center at the University of Kentucky. Partial support was provided by Sandia National Laboratories, a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA-0003525.
Copyright © 2018 Materials Research Society.
- scanning electron microscopy (SEM)
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Science (all)
- Condensed Matter Physics