Nano-Oxide-Dispersed Ferritic Steel for Fusion Energy Systems

Hsiung, L. L.; Tumey, S. J.; Hoelzer, D. T.; Fluss, M. J.

doi:10.1557/adv.2018.202

Title: Nano-Oxide-Dispersed Ferritic Steel for Fusion Energy Systems

Journal Article · 19 February 2018 · MRS Advances

DOI: https://doi.org/10.1557/adv.2018.202 · OSTI ID:1458650

Hsiung, L. L. ^[1]; Tumey, S. J. ^[1]; Hoelzer, D. T. ^[2]; Fluss, M. J. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of California, Berkeley, CA (United States)

ABSTRACT The role of oxide nanoparticles in cavity formation of a nano-oxide-dispersed ferritic steel subjected to (Fe + He) dual-ion and (Fe + He + H) triple-ion irradiations has been studied using transmission electron microscopy to elucidate the synergistic effects of helium and hydrogen on radiation tolerance of nano-oxide-dispersed ferritic steel for fusion energy systems. The effect of oxide nanoparticles on suppressing radiation-induced void swelling is clearly revealed from the observation of preferred trapping of helium bubbles at oxide nanoparticles, which results in a unimodal distribution of cavities in the (Fe + He) dual-ion irradiatedspecimen. An adverse effect of hydrogen implantation, however, is revealed from the observation of a bimodal distribution of cavities with large and facetted voids in association with the formation of HFe₅O₈-based hydroxide in local regions of the (Fe + He + H) triple-ion irradiated specimen.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; AC05-00OR22725

OSTI ID:: 1458650

Alternate ID(s):: OSTI ID: 1471885

Report Number(s):: LLNL-JRNL-742960; applab; 897866

Journal Information:: MRS Advances, Vol. 3, Issue 31; ISSN 2059-8521

Publisher:: Materials Research Society (MRS)Copyright Statement

Country of Publication:: United States

Language:: English

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