Effects of Zr addition on the microstructure of 14%Cr4%Al ODS ferritic steels

Jerome Isselin; Ryuta Kasada; Akihiko Kimura; Takanari Okuda; Masaki Inoue; Shigeharu Ukai; Somei Ohnuki; Toshiharu Fujisawa; Fujio Abe

doi:10.2320/matertrans.MBW200923

Effects of Zr addition on the microstructure of 14%Cr4%Al ODS ferritic steels

Jerome Isselin, Ryuta Kasada, Akihiko Kimura, Takanari Okuda, Masaki Inoue, Shigeharu Ukai, Somei Ohnuki, Toshiharu Fujisawa, Fujio Abe

IMR - Materials Design Division

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

Oxide dispersion-strengthened (ODS) ferritic steels have a good radiation resistance, high creep strength and a good swelling resistance. In such alloys, Zr is used to improve the creep properties by stabilizing the grains boundaries. The influence of the zirconium on the microstructure will be discussed is this study. The addition of Zr reduces strongly the number density of the inclusion distribution. The reduction factor is between 4 (transverse direction) to 15 (longitudinal direction). The addition of Zr reduces the formation of Al and Y oxides (micro scale). The carbide composition is also different according to the material composition. Zr-free material forms W/Ti carbides and Zr-added material forms Zr/Ti carbides without formation of W carbides (free enthalpy). Zr addition may be considered as very good in term of strength and corrosion resistance.

Original language	English
Pages (from-to)	1011-1015
Number of pages	5
Journal	Materials Transactions
Volume	51
Issue number	5
DOIs	https://doi.org/10.2320/matertrans.MBW200923
Publication status	Published - 2010 May

Keywords

Carbide
Oxide
Oxide dispersion-strengthened (ods) ferritic steel
Zirconium

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title = "Effects of Zr addition on the microstructure of 14%Cr4%Al ODS ferritic steels",

abstract = "Oxide dispersion-strengthened (ODS) ferritic steels have a good radiation resistance, high creep strength and a good swelling resistance. In such alloys, Zr is used to improve the creep properties by stabilizing the grains boundaries. The influence of the zirconium on the microstructure will be discussed is this study. The addition of Zr reduces strongly the number density of the inclusion distribution. The reduction factor is between 4 (transverse direction) to 15 (longitudinal direction). The addition of Zr reduces the formation of Al and Y oxides (micro scale). The carbide composition is also different according to the material composition. Zr-free material forms W/Ti carbides and Zr-added material forms Zr/Ti carbides without formation of W carbides (free enthalpy). Zr addition may be considered as very good in term of strength and corrosion resistance.",

keywords = "Carbide, Oxide, Oxide dispersion-strengthened (ods) ferritic steel, Zirconium",

author = "Jerome Isselin and Ryuta Kasada and Akihiko Kimura and Takanari Okuda and Masaki Inoue and Shigeharu Ukai and Somei Ohnuki and Toshiharu Fujisawa and Fujio Abe",

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AU - Isselin, Jerome

AU - Kasada, Ryuta

AU - Kimura, Akihiko

AU - Okuda, Takanari

AU - Inoue, Masaki

AU - Ukai, Shigeharu

AU - Ohnuki, Somei

AU - Fujisawa, Toshiharu

AU - Abe, Fujio

PY - 2010/5

Y1 - 2010/5

N2 - Oxide dispersion-strengthened (ODS) ferritic steels have a good radiation resistance, high creep strength and a good swelling resistance. In such alloys, Zr is used to improve the creep properties by stabilizing the grains boundaries. The influence of the zirconium on the microstructure will be discussed is this study. The addition of Zr reduces strongly the number density of the inclusion distribution. The reduction factor is between 4 (transverse direction) to 15 (longitudinal direction). The addition of Zr reduces the formation of Al and Y oxides (micro scale). The carbide composition is also different according to the material composition. Zr-free material forms W/Ti carbides and Zr-added material forms Zr/Ti carbides without formation of W carbides (free enthalpy). Zr addition may be considered as very good in term of strength and corrosion resistance.

AB - Oxide dispersion-strengthened (ODS) ferritic steels have a good radiation resistance, high creep strength and a good swelling resistance. In such alloys, Zr is used to improve the creep properties by stabilizing the grains boundaries. The influence of the zirconium on the microstructure will be discussed is this study. The addition of Zr reduces strongly the number density of the inclusion distribution. The reduction factor is between 4 (transverse direction) to 15 (longitudinal direction). The addition of Zr reduces the formation of Al and Y oxides (micro scale). The carbide composition is also different according to the material composition. Zr-free material forms W/Ti carbides and Zr-added material forms Zr/Ti carbides without formation of W carbides (free enthalpy). Zr addition may be considered as very good in term of strength and corrosion resistance.

KW - Carbide

KW - Oxide

KW - Oxide dispersion-strengthened (ods) ferritic steel

KW - Zirconium

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JO - Materials Transactions

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ER -

Effects of Zr addition on the microstructure of 14%Cr4%Al ODS ferritic steels

Abstract

Keywords

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