Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding

doi:10.1016/j.jnucmat.2017.12.035

Title: Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding

Abstract

Low-Cr oxide dispersion strengthened (ODS) FeCrAl alloys were developed as accident tolerant fuel cladding because of their excellent oxidation resistance at very high temperature, high strength and improved radiation tolerance. Fe-12Cr-5Al wt.% gas atomized powder was ball milled with Y ₂O ₃+FeO, Y ₂O ₃+ZrO ₂ or Y ₂O ₃+TiO ₂, and the resulting powders were extruded at 950°C. The resulting fine grain structure, particularly for the Ti and Zr containing alloys, led to very high strength but limited ductility. Comparison with variants of commercial PM2000 (Fe-20Cr-5Al) highlighted the significant impact of the powder consolidation step on the alloy grain size and, therefore, on the alloy mechanical properties at T < 500 °C. These low-Cr compositions exhibited good oxidation resistance at 1400 °C in air and steam for 4 h but could not form a protective alumina scale at 1450 °C, similar to observations for fine grained PM2000 alloys. As a result, the effect of alloy grain size, Zr and Ti additions, and impurities on the alloy mechanical and oxidation behaviors are discussed.

Authors:

^[1];

^[1]; Massey, Caleb P. ^[2];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)

Publication Date:: 2018-01-10

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1461065

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 501; Journal Issue: C; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Dryepondt, Sebastien N., Unocic, Kinga A., Hoelzer, David T., Massey, Caleb P., and Pint, Bruce A. Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.jnucmat.2017.12.035.

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                    Dryepondt, Sebastien N., Unocic, Kinga A., Hoelzer, David T., Massey, Caleb P., & Pint, Bruce A. Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding.  United States.  doi:10.1016/j.jnucmat.2017.12.035.

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                    Dryepondt, Sebastien N., Unocic, Kinga A., Hoelzer, David T., Massey, Caleb P., and Pint, Bruce A. Wed .  
        "Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding".  United States.  doi:10.1016/j.jnucmat.2017.12.035.  https://www.osti.gov/servlets/purl/1461065.

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@article{osti_1461065,

  title        = {Development of low-Cr ODS FeCrAl alloys for accident-tolerant fuel cladding},

  author       = {Dryepondt, Sebastien N. and Unocic, Kinga A. and Hoelzer, David T. and Massey, Caleb P. and Pint, Bruce A.},

  abstractNote = {Low-Cr oxide dispersion strengthened (ODS) FeCrAl alloys were developed as accident tolerant fuel cladding because of their excellent oxidation resistance at very high temperature, high strength and improved radiation tolerance. Fe-12Cr-5Al wt.% gas atomized powder was ball milled with Y2O3+FeO, Y2O3+ZrO2 or Y2O3+TiO2, and the resulting powders were extruded at 950°C. The resulting fine grain structure, particularly for the Ti and Zr containing alloys, led to very high strength but limited ductility. Comparison with variants of commercial PM2000 (Fe-20Cr-5Al) highlighted the significant impact of the powder consolidation step on the alloy grain size and, therefore, on the alloy mechanical properties at T < 500 °C. These low-Cr compositions exhibited good oxidation resistance at 1400 °C in air and steam for 4 h but could not form a protective alumina scale at 1450 °C, similar to observations for fine grained PM2000 alloys. As a result, the effect of alloy grain size, Zr and Ti additions, and impurities on the alloy mechanical and oxidation behaviors are discussed.},

  doi          = {10.1016/j.jnucmat.2017.12.035},

  journal      = {Journal of Nuclear Materials},

  issn         = {0022-3115},

  number       = C,

  volume       = 501,

  place        = {United States},

  year         = {2018},

  month        = {1}

}

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Journal Article:

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DOI: 10.1016/j.jnucmat.2017.12.035

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Cited by: 9 works

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Figures / Tables:

Table 1: Alloys composition measured by inductively coupled plasma optical emission spectrometry, combustion, and inert gas fusion for the Fe-12Cr-5Al ODS FeCrAl alloys and former commercial PM2000 alloys

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