Microstructure control of high nitrogen alpha + beta type titanium alloy

Tomohiro Ando, Koichi Nakashima, Toshihiro Tsuchiyama, Setsuo Takaki

    Research output: Contribution to journalArticlepeer-review


    Solution nitriding and aging treatment were applied to Ti-4mass%Cr alloy in order to fabricate a ductile high-nitrogen titanium alloy with fine (α + β) structure. The solution-nitrided specimen with a' martensitic structure was significantly hardened by solid solution strengthening by the absorbed nitrogen. During the aging treatment, fine β grains with a size of 1 microns in thickness precipitated along the martensite-plate boundaries. Although the specimen was softened to some extent after the aging treatment, the hardness is kept much higher than that of the aged Ti-4mass%Cr alloy without solution nitriding. This indicates that the nitrogen is still in solid solution of a phase even after the aging treatment, and contributes to strengthening of the fine-structured Ti-4mass%Cr-N alloy.

    Original languageEnglish
    Pages (from-to)193-196
    Number of pages4
    JournalKey Engineering Materials
    Volume345-346 I
    Publication statusPublished - 2007

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering


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