Improvement of corrosion resistance of vanadium alloys in high-temperature pressurized water

Mitsuhiro Fujiwara, Toshiya Sakamoto, Manabu Satou, Akira Hasegawa, Katsunori Abe, Kazuo Kaiuchi, Takemi Furuya

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Corrosion tests in pressurized and vaporized water were conducted for V-based high Cr and Ti alloys and V-4Cr-4Ti type alloys containing minor elements such as Si, Al and Y. Weight losses were observed for every alloy after corrosion tests in pressurized water. It was apparent that addition of Cr effectively reduced the weight change in pressurized water. The weight loss of V-4Cr-4Ti type alloys in corrosion tests in vaporized water was also reduced as Cr content increased. The V-20Cr-4Ti alloy had a slight weight gain, almost same as that of SUS316, which had the best corrosion properties in the tested alloys. The elongation of alloys with in excess of 10% Cr was reduced as Cr content increased. The elongations of the V-12Cr-4Ti and the V-15Cr-4Ti alloys were significantly reduced by corrosion and cleavage fracture was observed reflecting hydrogen embrittlement. The reduced elongations of the alloys were recovered to the same level of as annealed conditions after hydrogen degassing. After corrosion, the V-15Cr-4Ti-0.5Y alloy still kept enough elongation, suggesting that the addition of Y is effective to reduce the hydrogen embrittlement.

Original languageEnglish
Pages (from-to)517-521
Number of pages5
JournalMaterials Transactions
Volume46
Issue number3
DOIs
Publication statusPublished - 2005 Mar

Keywords

  • Corrosion
  • Fusion reactor materials
  • Low activation materials
  • Mechanical properties
  • Vanadium alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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