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Metallurgical and Materials Transactions A

, Volume 27, Issue 8, pp 2151–2159 | Cite as

Microstructure and phase identification in type 304 stainless steel-zirconium alloys

  • Daniel P. Abraham
  • Sean M. McDeavitt
  • Jangyul Park
Alloy Phases

Abstract

Stainless steel-zirconium alloys have been developed at Argonne National Laboratory to contain radioactive metal isotopes isolated from spent nuclear fuel. This article discusses the various phases that are formed in as-cast alloys of type 304 stainless steel and zirconium that contain up to 92 wt pct Zr. Microstructural characterization was performed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), and crystal structure information was obtained by X-ray diffraction. Type 304SS-Zr alloys with 5 and 10 wt pct Zr have a three-phase microstructure—austenite, ferrite, and the Laves intermetallic, Zr(Fe,Cr,Ni)2+x. whereas alloys with 15, 20, and 30 wt pct Zr contain only two phases—ferrite and Zr(Fe,Cr,Ni)2+x. Alloys with 45 to 67 wt pct Zr contain a mixture of Zr(Fe,Cr,Ni)2+x and Zr2(Ni,Fe), whereas alloys with 83 and 92 wt pct Zr contain three phases—α-Zr, Zr2(Ni,Fe), and Zr(Fe,Cr,Ni)2+x. Fe3Zr-type and Zr3Fe-type phases were not observed in the type 304SS-Zr alloys. The changes in alloy microstructure with zirconium content have been correlated to the Fe-Zr binary phase diagram.

Keywords

Zirconium Ferrite Austenite Material Transaction Lave Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Minerals, Metals & Material Society 1996

Authors and Affiliations

  • Daniel P. Abraham
    • 1
  • Sean M. McDeavitt
    • 1
  • Jangyul Park
    • 2
  1. 1.Chemical Technology DivisionArgonne National LaboratoryArgonne
  2. 2.Energy Technology DivisionArgonne National LaboratoryArgonne

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