Mechanical properties and microstructures of high-chromium V-Cr-Ti type alloys

K. Sakai, M. Satou, M. Fujiwara, K. Takanashi, A. Hasegawa, K. Abe

Research output: Contribution to journalConference articlepeer-review

29 Citations (Scopus)


The mechanical properties of V-Cr-Ti type alloys depended on heat treatment conditions and Cr concentrations. In this paper the correlation between mechanical properties and heat treatment conditions as a function of Cr concentrations was explored using mini-size Charpy impact tests and microstructure observations. Vanadium alloys evaluated were V-xCr-4Ti (x=4, 7, 10, 12, 15, 20). Microstructure observations using transmission electron microscope (TEM) were performed to characterize the precipitates. The typical precipitates in the V-xCr-4Ti alloys were identified as Ti(C,O,N) and TiO 2. Ti(C,O,N) was observed in specimens annealed between 900 and 1000 °C and TiO2 was between 1100 and 1200 °C. The DBTT of V-(4,7)Cr-4Ti alloys was around -190 °C, while DBTT for the other alloys were above -30 °C. It is proposed that formation of precipitates larger than 400 nm in diameter found in the alloys containing more than 10% of Cr as well as solution hardening of Cr are affected to the increase of the DBTT of the alloys.

Original languageEnglish
Pages (from-to)457-461
Number of pages5
JournalJournal of Nuclear Materials
Issue number1-3 PART A
Publication statusPublished - 2004 Aug 1
EventProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
Duration: 2003 Dec 72003 Dec 12

ASJC Scopus subject areas

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


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