MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Development of α/γ Transformable FeCrAl-ODS Alloys by Nickel Addition
Tomonori NishikawaShenghua ZhangShigeharu UkaiNaoko OonoShigenari Hayashi
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Keywords: FeCrAl, ODS, ATF
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2019 Volume 60 Issue 2 Pages 355-363

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Abstract

Utilizing γ/α transformation allows for a wider range of structure control for Al2O3-forming FeCrAl alloys considered as a candidate for the advanced fast reactor fuel cladding. In this research, nickel addition was explored as a method for creating γ-austenite at 1000°C and retaining α-ferrite at room temperature through computing phase diagram by FactSage and implementing HT-XRD & EPMA experiments. In addition, Al2O3 scale formation by oxidation test was implemented at 1000°C. Those results indicated that structure control by the γ/α transformation is realized with appropriate aluminum and nickel addition, keeping continuous Al2O3 scale formation.

Fig. 1 Pseudo binary phase diagram Fe–12Cr–4.5Al–xNi calculated by FactSage. Fullsize Image
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© 2019 The Japan Institute of Metals and Materials
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