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Multi-step Internal Nitriding of Tungsten-titanium Alloys

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  • URLhttps://db.koreascholar.com/Article/Detail/4422
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한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Internally nitrided dilute W-Ti alloy specimens having a heavily deformed surface microstructure were prepared by a multi-step internal nitriding at 1573-2073 K. Primary nitriding below their recrystallization temperature induced a precipitation of ultrafine TiN particles. After secondary and tertiary nitriding, those precipitates grew into rod-like TiN with a length of 20-60 nm. The recrystallization temperature after nitriding was elevated above 2073 K. The yield strength at 1773 K obtained from nitrided W-0.5 mass% Ti alloy was about 5 times as large as that of the recrystallized specimen. DBTT of the nitrided alloys was about 373 K.

저자
  • Nagae
  • Masahiro
  • Yoshio
  • Tetsuo
  • Takada
  • Jun
  • Hiraoka
  • Yutaka
  • Takida
  • Tomohiro