Microstructure and Mechanical Properties of 14Cr-ODS Steels with Zr Addition

In this study, oxide dispersion strengthened (ODS) ferritic steels with nominal composition of Fe–14Cr–2W–0.35Y (14Cr non Zr-ODS) and Fe–14Cr–2W–0.3Zr–0.35Y (14Cr–Zr-ODS) were fabricated by mechanical alloying (MA) and hot isostatic pressing (HIP) technique to explore the impact of Zr addition on th...

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Published inHigh temperature materials and processes Vol. 38; no. 2019; pp. 404 - 410
Main Authors Li, Weijuan, Xu, Haijian, Sha, Xiaochun, Meng, Jingsong, Wang, Zhaodong
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 25.02.2019
Walter de Gruyter GmbH
Subjects
Dispersion hardening alloys
Dispersion hardening steels
Ferritic stainless steels
Heat treating
Hot isostatic pressing
Iron
Mechanical alloying
Mechanical properties
Microstructure
ODS ferritic steel
Oxide dispersion strengthening
Ultimate tensile strength
Zirconium
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Summary:In this study, oxide dispersion strengthened (ODS) ferritic steels with nominal composition of Fe–14Cr–2W–0.35Y (14Cr non Zr-ODS) and Fe–14Cr–2W–0.3Zr–0.35Y (14Cr–Zr-ODS) were fabricated by mechanical alloying (MA) and hot isostatic pressing (HIP) technique to explore the impact of Zr addition on the microstructure and mechanical properties of 14Cr-ODS steels. Microstructure characterization revealed that Zr addition led to the formation of finer oxides, which was identified as Y Zr , with denser dispersion in the matrix. The ultimate tensile strength (UTS) of the non Zr-ODS steel is about 1201 MPa, but UTS of the Zr-ODS steel increases to1372 MPa, indicating the enhancement of mechanical properties by Zr addition.
ISSN:0334-6455
2191-0324
DOI:10.1515/htmp-2018-0067