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

Wurmshuber, Michael; Frazer, David; Bachmaier, Andrea; Wang, Yongqiang; Hosemann, Peter; Kiener, Daniel

doi:10.1016/j.matdes.2018.11.007

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

Journal Article · 05 November 2018 · Materials & Design

DOI: https://doi.org/10.1016/j.matdes.2018.11.007 · OSTI ID:1561077

Wurmshuber, Michael ^[1];

^[2]; Bachmaier, Andrea ^[3];

^[4]; Hosemann, Peter ^[2];

^[1]

Montanuniversität Leoben (Austria)
Univ. of California, Berkeley, CA (United States)
Austrian Academy of Sciences, Leoben (Austria)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); European Research Council (ERC)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1561077

Report Number(s):: LA-UR-18-31142; TRN: US2000585

Journal Information:: Materials & Design, Vol. 160, Issue C; ISSN 0264-1275

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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36 MATERIALS SCIENCE
Severe plastic deformation
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Title: Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag

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