Next Article in Journal
Pozzolanic Reactivity of Silica Fume and Ground Rice Husk Ash as Reactive Silica in a Cementitious System: A Comparative Study
Previous Article in Journal
Effect of Ionic Correlations on the Surface Forces in Thin Liquid Films: Influence of Multivalent Coions and Extended Theory
Previous Article in Special Issue
Irradiation Induced Microstructure Evolution in Nanostructured Materials: A Review
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessFeature PaperArticle
Materials 2016, 9(3), 144; doi:10.3390/ma9030144

The Role of Grain Size on Neutron Irradiation Response of Nanocrystalline Copper

Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27695, USA
Idaho National Laboratory, P.O. Box 1625 Idaho Falls, ID 83415-6188, USA
Current address: Nuclear Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA.
Author to whom correspondence should be addressed.
Academic Editor: Jie Lian
Received: 2 December 2015 / Revised: 31 January 2016 / Accepted: 23 February 2016 / Published: 1 March 2016
(This article belongs to the Special Issue Nuclear Materials 2015)


The role of grain size on the developed microstructure and mechanical properties of neutron irradiated nanocrystalline copper was investigated by comparing the radiation response of material to the conventional micrograined counterpart. Nanocrystalline (nc) and micrograined (MG) copper samples were subjected to a range of neutron exposure levels from 0.0034 to 2 dpa. At all damage levels, the response of MG-copper was governed by radiation hardening manifested by an increase in strength with accompanying ductility loss. Conversely, the response of nc-copper to neutron irradiation exhibited a dependence on the damage level. At low damage levels, grain growth was the primary response, with radiation hardening and embrittlement becoming the dominant responses with increasing damage levels. Annealing experiments revealed that grain growth in nc-copper is composed of both thermally-activated and irradiation-induced components. Tensile tests revealed minimal change in the source hardening component of the yield stress in MG-copper, while the source hardening component was found to decrease with increasing radiation exposure in nc-copper. View Full-Text
Keywords: copper; nanocrystalline; neutron irradiation; grain growth; radiation hardening; thermal stability copper; nanocrystalline; neutron irradiation; grain growth; radiation hardening; thermal stability

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Mohamed, W.; Miller, B.; Porter, D.; Murty, K. The Role of Grain Size on Neutron Irradiation Response of Nanocrystalline Copper. Materials 2016, 9, 144.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top