DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling irradiation creep of graphite using rate theory

Abstract

In this work we examined irradiation induced creep of graphite in the framework of transition state rate theory. Experimental data for two grades of nuclear graphite (H-337 and AGOT) were analyzed to determine the stress exponent (n) and activation energy (Q) for plastic flow under irradiation. Here we show that the mean activation energy lies between 0.14 and 0.32 eV with a mean stress-exponent of 1.0 ± 0.2. A stress exponent of unity and the unusually low activation energies strongly indicate a diffusive defect transport mechanism for neutron doses in the range of 3-4 x 1022 n/cm2.

Authors:
 [1];  [1];  [1];  [1];  [2]
  1. North Carolina State Univ., Raleigh, NC (United States). Dept. of Nuclear Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1261400
Alternate Identifier(s):
OSTI ID: 1345241
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 473; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 36 MATERIALS SCIENCE; Graphite; Creep; Irradiation; Activation energy

Citation Formats

Sarkar, Apu, Eapen, Jacob, Raj, Anant, Murty, K. L., and Burchell, T. D. Modeling irradiation creep of graphite using rate theory. United States: N. p., 2016. Web. doi:10.1016/j.jnucmat.2016.01.036.
Sarkar, Apu, Eapen, Jacob, Raj, Anant, Murty, K. L., & Burchell, T. D. Modeling irradiation creep of graphite using rate theory. United States. https://doi.org/10.1016/j.jnucmat.2016.01.036
Sarkar, Apu, Eapen, Jacob, Raj, Anant, Murty, K. L., and Burchell, T. D. Sat . "Modeling irradiation creep of graphite using rate theory". United States. https://doi.org/10.1016/j.jnucmat.2016.01.036. https://www.osti.gov/servlets/purl/1261400.
@article{osti_1261400,
title = {Modeling irradiation creep of graphite using rate theory},
author = {Sarkar, Apu and Eapen, Jacob and Raj, Anant and Murty, K. L. and Burchell, T. D.},
abstractNote = {In this work we examined irradiation induced creep of graphite in the framework of transition state rate theory. Experimental data for two grades of nuclear graphite (H-337 and AGOT) were analyzed to determine the stress exponent (n) and activation energy (Q) for plastic flow under irradiation. Here we show that the mean activation energy lies between 0.14 and 0.32 eV with a mean stress-exponent of 1.0 ± 0.2. A stress exponent of unity and the unusually low activation energies strongly indicate a diffusive defect transport mechanism for neutron doses in the range of 3-4 x 1022 n/cm2.},
doi = {10.1016/j.jnucmat.2016.01.036},
journal = {Journal of Nuclear Materials},
number = C,
volume = 473,
place = {United States},
year = {Sat Feb 20 00:00:00 EST 2016},
month = {Sat Feb 20 00:00:00 EST 2016}
}

Journal Article:

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share: