Effect of specimen size and grain orientation on the mechanical and physical properties of NBG-18 nuclear graphite
Abstract
Here we present a comparison of the measured baseline mechanical and physical properties of with grain (WG) and against grain (AG) non-ASTM size NBG-18 graphite. The objectives of the experiments were twofold: (1) assess the variation in properties with grain orientation; (2) establish a correlation between specimen tensile strength and size. The tensile strength of the smallest sized (4 mm diameter) specimens were about 5% higher than the standard specimens (12 mm diameter) but still within one standard deviation of the ASTM specimen size indicating no significant dependence of strength on specimen size. The thermal expansion coefficient and elastic constants did not show significant dependence on specimen size. Lastly, experimental data indicated that the variation of thermal expansion coefficient and elastic constants were still within 5% between the different grain orientations, confirming the isotropic nature of NBG-18 graphite in physical properties.
- Authors:
-
- Virginia Commonwealth Univ., Richmond, VA (United States). Dept. of Mechanical & Nuclear Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Dept. of Energy, Gaithersburg, MD (United States). Office of Fusion Energy
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1364290
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 462; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
Citation Formats
Vasudevamurthy, G., Byun, T. S., Pappano, Pete, Snead, Lance L., and Burchell, Tim D. Effect of specimen size and grain orientation on the mechanical and physical properties of NBG-18 nuclear graphite. United States: N. p., 2015.
Web. doi:10.1016/j.jnucmat.2015.02.012.
Vasudevamurthy, G., Byun, T. S., Pappano, Pete, Snead, Lance L., & Burchell, Tim D. Effect of specimen size and grain orientation on the mechanical and physical properties of NBG-18 nuclear graphite. United States. https://doi.org/10.1016/j.jnucmat.2015.02.012
Vasudevamurthy, G., Byun, T. S., Pappano, Pete, Snead, Lance L., and Burchell, Tim D. Fri .
"Effect of specimen size and grain orientation on the mechanical and physical properties of NBG-18 nuclear graphite". United States. https://doi.org/10.1016/j.jnucmat.2015.02.012. https://www.osti.gov/servlets/purl/1364290.
@article{osti_1364290,
title = {Effect of specimen size and grain orientation on the mechanical and physical properties of NBG-18 nuclear graphite},
author = {Vasudevamurthy, G. and Byun, T. S. and Pappano, Pete and Snead, Lance L. and Burchell, Tim D.},
abstractNote = {Here we present a comparison of the measured baseline mechanical and physical properties of with grain (WG) and against grain (AG) non-ASTM size NBG-18 graphite. The objectives of the experiments were twofold: (1) assess the variation in properties with grain orientation; (2) establish a correlation between specimen tensile strength and size. The tensile strength of the smallest sized (4 mm diameter) specimens were about 5% higher than the standard specimens (12 mm diameter) but still within one standard deviation of the ASTM specimen size indicating no significant dependence of strength on specimen size. The thermal expansion coefficient and elastic constants did not show significant dependence on specimen size. Lastly, experimental data indicated that the variation of thermal expansion coefficient and elastic constants were still within 5% between the different grain orientations, confirming the isotropic nature of NBG-18 graphite in physical properties.},
doi = {10.1016/j.jnucmat.2015.02.012},
journal = {Journal of Nuclear Materials},
number = C,
volume = 462,
place = {United States},
year = {Fri Mar 13 00:00:00 EDT 2015},
month = {Fri Mar 13 00:00:00 EDT 2015}
}
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