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Effect of Nb and Fe on damage evolution in a Zr-alloy during proton and neutron irradiation
- Source :
- Francis, E, Babu, R P, Harte, A, Martin, T L, Frankel, P, Jädernäs, D, Romero, J, Hallstadius, L, Bagot, P A J, Moody, M P & Preuss, M 2019, ' Effect of Nb and Fe on damage evolution in a Zr-alloy during proton and neutron irradiation ', Acta Materialia, vol. 165, pp. 603-614 . https://doi.org/10.1016/j.actamat.2018.12.021
- Publication Year :
- 2019
- Publisher :
- Elsevier, 2019.
-
Abstract
- Detailed analysis was carried out on proton and a neutron irradiated Nb-containing Zr-alloy to study the evolution of dislocation loop size and densities as well as the formation and evolution of irradiation-induced precipitation/clustering. The results obtained here have been contrasted against previously published work on a Nb-free Zr-alloy [1, 2] to investigate the mechanistic reason for the improved resistance to irradiation-induced growth of Nb-containing Zr alloys. The combined use of bright field scanning transmission electron microscopy, ultra-high-resolution energy dispersive spectroscopy and atom probe tomography analysis provides evidence of evenly distributed radiation-induced Nb clusters that have formed during the early stage of proton irradiation and Fe-rich nano-rods near Fe-containing second phase particles. The former seems to have a profound effect on loop and subsequent loop formation, keeping loop size small but number density high while loops seem to initially form at similar dose levels compared to a Nb-free alloy but loop line density does not increase during further irradiation. It is hypothesized that the formation of the Nb nano-precipitates/clusters significantly hinders mobility and growth of loops, resulting in a small size, high number density and limited ability of loops to arrange along basal traces compared to Nb-free Zr-alloys. It is suggested that it is the limited loop arrangement that slows down loop formation and the root cause for the high resistance of Nb-containing Zr-alloys to irradiation-induced growth.
- Subjects :
- Materials science
Polymers and Plastics
Proton
Low-Sn ZIRLO™
02 engineering and technology
Atom probe
01 natural sciences
Molecular physics
law.invention
Clusters
Radiation induced precipitation
law
Phase (matter)
0103 physical sciences
Scanning transmission electron microscopy
Dalton Nuclear Institute
Neutron
Irradiation
010302 applied physics
Number density
technology, industry, and agriculture
Metals and Alloys
021001 nanoscience & nanotechnology
Electronic, Optical and Magnetic Materials
Atom probe tomography
Dislocation loops
ResearchInstitutes_Networks_Beacons/dalton_nuclear_institute
TEM
Ceramics and Composites
Breakaway growth
Dislocation
0210 nano-technology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Francis, E, Babu, R P, Harte, A, Martin, T L, Frankel, P, Jädernäs, D, Romero, J, Hallstadius, L, Bagot, P A J, Moody, M P & Preuss, M 2019, ' Effect of Nb and Fe on damage evolution in a Zr-alloy during proton and neutron irradiation ', Acta Materialia, vol. 165, pp. 603-614 . https://doi.org/10.1016/j.actamat.2018.12.021
- Accession number :
- edsair.doi.dedup.....bac3ee6c2c449e7141fb2d544cf684a8