Abstract
In advanced nuclear applications, high temperature and a corrosive environment are present in addition to a high dose radiation field causing displacement damage in the material. In recent times it has been shown that Nanostructured Ferritic Alloys (NFA's) such as advanced Oxide Dispersion Strengthened (ODS) steels are suitable for this environment as they tolerate high dose irradiation without significant changes in microstructure or relevant mechanical properties. Ion beam irradiation is a fast and cost effective way to induce radiation damage in materials but has limited penetration depth. Therefore, small scale mechanical testing such as nanoindentation and micro compression testing in combination with FIB based sample preparation for micro structural characterization has to be performed allowing a full assessment of the materials' behavior under radiation environment. In this work two different ODS materials have been irradiated using proton and combined proton and He beams up to 1 dpa at different temperatures. Nanoindentation and LEAP measurements were performed in order to assess the changes in properties of these alloys due to irradiation. The same techniques were applied to intermetallic nanostructured alloys in order to investigate the effectiveness of the metal-intermetallic interface to provide defect sinks for He and radiation damage. It was found that irradiation can cause the formation of intermetallic particles even at room temperature while increasing the material strength significantly.
| Original language | English |
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| Title of host publication | Advanced Materials for Applications in Extreme Environments |
| Pages | 217-226 |
| Number of pages | 10 |
| DOIs | |
| State | Published - 2011 |
| Externally published | Yes |
| Event | 2010 MRS Fall Meeting - Boston, MA, United States Duration: Nov 29 2010 → Dec 3 2010 |
Publication series
| Name | Materials Research Society Symposium Proceedings |
|---|---|
| Volume | 1298 |
| ISSN (Print) | 0272-9172 |
Conference
| Conference | 2010 MRS Fall Meeting |
|---|---|
| Country/Territory | United States |
| City | Boston, MA |
| Period | 11/29/10 → 12/3/10 |
Funding
This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396. This work has benefited from the use of the Lujan Neutron Scattering Center atLANSCE, which is funded by the Office of Basic Energy Sciences (DOE). Los AlamosNational Laboratory is operated by Los Alamos National Security LLC under DOEContract DE-AC52-06NA25396.