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Title: Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag

Abstract

Newest developments in nuclear fission and fusion technology as well as planned long-distance space missions demand novel materials to withstand harsh, irradiative environments. Radiation-induced hardening and embrittlement are a concern that can lead to failure of materials deployed in these applications. Here the underlying mechanisms are accommodation and clustering of lattice defects created by the incident radiation particles. Interfaces, such as free surfaces, phase and grain boundaries, are known for trapping and annihilating defects and therefore preventing these radiation-induced defects from forming clusters. In this work, differently structured nanocomposite materials based on Cu-Fe-Ag were fabricated using a novel solid-state route, combining severe plastic deformation with thermal and electrochemical treatments. The influence of different interface types and spacings on radiation effects in these materials was investigated using nanoindentation. Interface-rich bulk nanocomposites showed a slight decrease in hardness after irradiation, whereas the properties of a nanoporous material remain mostly unchanged. An explanation for this different material behavior and its link to recovery mechanisms at interfaces is attempted in this work, paving a concept towards radiation resistant materials.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [2]; ORCiD logo [1]
  1. Montanuniversität Leoben (Austria)
  2. Univ. of California, Berkeley, CA (United States)
  3. Austrian Academy of Sciences, Leoben (Austria)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); European Research Council (ERC)
OSTI Identifier:
1561077
Report Number(s):
LA-UR-18-31142
Journal ID: ISSN 0264-1275
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Materials & Design
Additional Journal Information:
Journal Volume: 160; Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Severe plastic deformation; Nanostructured materials; Nanoindentation; Defect-interface interactions; Radiation resistant materials

Citation Formats

Wurmshuber, Michael, Frazer, David, Bachmaier, Andrea, Wang, Yongqiang, Hosemann, Peter, and Kiener, Daniel. Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag. United States: N. p., 2018. Web. doi:10.1016/j.matdes.2018.11.007.
Wurmshuber, Michael, Frazer, David, Bachmaier, Andrea, Wang, Yongqiang, Hosemann, Peter, & Kiener, Daniel. Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag. United States. doi:10.1016/j.matdes.2018.11.007.
Wurmshuber, Michael, Frazer, David, Bachmaier, Andrea, Wang, Yongqiang, Hosemann, Peter, and Kiener, Daniel. Mon . "Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag". United States. doi:10.1016/j.matdes.2018.11.007. https://www.osti.gov/servlets/purl/1561077.
@article{osti_1561077,
title = {Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag},
author = {Wurmshuber, Michael and Frazer, David and Bachmaier, Andrea and Wang, Yongqiang and Hosemann, Peter and Kiener, Daniel},
abstractNote = {Newest developments in nuclear fission and fusion technology as well as planned long-distance space missions demand novel materials to withstand harsh, irradiative environments. Radiation-induced hardening and embrittlement are a concern that can lead to failure of materials deployed in these applications. Here the underlying mechanisms are accommodation and clustering of lattice defects created by the incident radiation particles. Interfaces, such as free surfaces, phase and grain boundaries, are known for trapping and annihilating defects and therefore preventing these radiation-induced defects from forming clusters. In this work, differently structured nanocomposite materials based on Cu-Fe-Ag were fabricated using a novel solid-state route, combining severe plastic deformation with thermal and electrochemical treatments. The influence of different interface types and spacings on radiation effects in these materials was investigated using nanoindentation. Interface-rich bulk nanocomposites showed a slight decrease in hardness after irradiation, whereas the properties of a nanoporous material remain mostly unchanged. An explanation for this different material behavior and its link to recovery mechanisms at interfaces is attempted in this work, paving a concept towards radiation resistant materials.},
doi = {10.1016/j.matdes.2018.11.007},
journal = {Materials & Design},
number = C,
volume = 160,
place = {United States},
year = {2018},
month = {11}
}

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