Mechanical properties of nanoporous gold in tension
Abstract
We report results of the tensile properties of nanoporous gold (NPG) as a function of the density and average ligament diameter. As-dealloyed tensile samples were thermally treated to coarsen the length scale of the NPG structure while increasing the sample density resulting from thickness reductions. The behaviors of samples with mean ligament diameters ranging from 30 to 750 nm and corresponding densities ranging from 0.30 to 0.57 that of bulk gold were examined. Digital image analysis was used to obtain ligament size histograms that were fit to the Weibull distribution. The Young's modulus was found to obey a power law, but with an exponent larger than that predicted by Gibson-Ashby scaling. The fracture behavior showed a brittle-ductile transition as a function of increasing ligament size. For samples characterized by a mean ligament diameter less than ~ 220 nm, the tensile behavior was linear elastic to sample fracture while samples with larger scale ligaments showed macroscopic yielding prior to fracture. These results are interpreted within the framework of extreme value statistics.
- Authors:
-
- Arizona State Univ., Tempe, AZ (United States). Ira A. Fulton School of Engineering
- Publication Date:
- Research Org.:
- Arizona State Univ., Tempe, AZ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1533469
- Alternate Identifier(s):
- OSTI ID: 1419114
- Grant/Contract Number:
- SC0008677
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Volume: 129; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; nanoporous gold; mechanical properties; digital image analysis; brittle-to-ductile transition; extreme value statistics
Citation Formats
Badwe, Nilesh, Chen, Xiying, and Sieradzki, Karl. Mechanical properties of nanoporous gold in tension. United States: N. p., 2017.
Web. doi:10.1016/j.actamat.2017.02.040.
Badwe, Nilesh, Chen, Xiying, & Sieradzki, Karl. Mechanical properties of nanoporous gold in tension. United States. https://doi.org/10.1016/j.actamat.2017.02.040
Badwe, Nilesh, Chen, Xiying, and Sieradzki, Karl. Thu .
"Mechanical properties of nanoporous gold in tension". United States. https://doi.org/10.1016/j.actamat.2017.02.040. https://www.osti.gov/servlets/purl/1533469.
@article{osti_1533469,
title = {Mechanical properties of nanoporous gold in tension},
author = {Badwe, Nilesh and Chen, Xiying and Sieradzki, Karl},
abstractNote = {We report results of the tensile properties of nanoporous gold (NPG) as a function of the density and average ligament diameter. As-dealloyed tensile samples were thermally treated to coarsen the length scale of the NPG structure while increasing the sample density resulting from thickness reductions. The behaviors of samples with mean ligament diameters ranging from 30 to 750 nm and corresponding densities ranging from 0.30 to 0.57 that of bulk gold were examined. Digital image analysis was used to obtain ligament size histograms that were fit to the Weibull distribution. The Young's modulus was found to obey a power law, but with an exponent larger than that predicted by Gibson-Ashby scaling. The fracture behavior showed a brittle-ductile transition as a function of increasing ligament size. For samples characterized by a mean ligament diameter less than ~ 220 nm, the tensile behavior was linear elastic to sample fracture while samples with larger scale ligaments showed macroscopic yielding prior to fracture. These results are interpreted within the framework of extreme value statistics.},
doi = {10.1016/j.actamat.2017.02.040},
journal = {Acta Materialia},
number = ,
volume = 129,
place = {United States},
year = {Thu Feb 16 00:00:00 EST 2017},
month = {Thu Feb 16 00:00:00 EST 2017}
}
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