Effects of doping elements on oxidation properties of V-Cr-Ti type alloys in several environments

M. Fujiwara, K. Natesan, M. Satou, A. Hasegawa, K. Abe

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14 Citations (Scopus)

Abstract

The alloys examined in this study include V-4Cr-4Ti-0.5Si, V-4Cr-4Ti-0.5Al, V-4Cr-4Ti-0.5Y and V-4Cr-4Ti. Oxidation experiments were conducted in air. After oxidation, tensile tests, hardness measurements and scanning electron microscopy were performed. Surface oxidation layers were identified by X-ray diffraction (XRD) analysis. Based on this study, the alloy doped with Y was excellent in oxidation resistance at 600 and 700 °C. The XRD indicated that V2O5 was the primary oxide phase for the alloys tested at 700 °C, except for the V-4Cr-4Ti-0.5Y alloy. The oxide identified at all temperatures in V-4Cr-4Ti-0.5Y alloy was VO2, that was also observed for the other alloys after testing at 600 °C. It was suggested that the formation of thin and dense VO2 oxide layers had an important role for superior oxidation properties of the V-4Cr-4Ti-0.5Y alloy. From the results of this study, further optimization of the V-4Cr-4Ti alloy could be possible by controlling the small addition of yttrium.

Original languageEnglish
Pages (from-to)601-604
Number of pages4
JournalJournal of Nuclear Materials
Volume307-311
Issue number1 SUPPL.
DOIs
Publication statusPublished - 2002 Dec 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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