Influence of welding and neutron irradiation on dislocation loop formation and α' precipitation in a FeCrAl alloy

Zhang, Dalong; Briggs, Samuel A.; Edmondson, Philip D.; Gussev, Maxim N.; Howard, Richard H.; Field, Kevin G.

doi:10.1016/j.jnucmat.2019.151784

Title: Influence of welding and neutron irradiation on dislocation loop formation and α' precipitation in a FeCrAl alloy

Journal Article · Tue Sep 03 00:00:00 EDT 2019 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2019.151784· OSTI ID:1659640

^[1]; Briggs, Samuel A. ^[2];

^[3];

^[3]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Oregon State Univ., Corvallis, OR (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

An advanced accident-tolerant FeCrAl alloy, C35 M (Fe–13Cr–10Al–1Mo, at %), and its laser-fusion weldments were studied after neutron irradiation up to 1.8 dpa at 357 °C to evaluate the radiation damage and α'-precipitation kinetics. Results show that the densities of α' in the fusion zone (FZ) and the heat-affected zone (HAZ) were only a third of that in the base material, i.e., 2.3 × 10²⁴m^-3. Here, density of dislocation loops in the FZ and HAZ were less than half of that in base material. The size of α' precipitates and the dislocation loops were found to be smaller in base material, compared to FZ and HAZ. The variances in microstructural response within the different regions were attributed to initial as-welded states of each region, indicating the impact of the pre-irradiation condition on radiation response in FeCrAl alloys.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC05-00OR22725; AC05-76RL01830

OSTI ID:: 1659640

Alternate ID(s):: OSTI ID: 1564377

Journal Information:: Journal of Nuclear Materials, Vol. 527, Issue n/a; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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Title: Influence of welding and neutron irradiation on dislocation loop formation and α' precipitation in a FeCrAl alloy

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