The Effect of Ti Addition on Phase Equilibria among Ni (A1), Ni3Al (L12) and Ni3V (D022) Phases

Eiki Hayashi; Satoru Kobayashi; Kazuhisa Sato; Toyohiko J. Konno; Yasuyuki Kaneno; Takayuki Takasugi

doi:10.4028/www.scientific.net/MSF.654-656.432

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656The Effect of Ti Addition on Phase Equilibria...

The Effect of Ti Addition on Phase Equilibria among Ni (A1), Ni₃Al (L1₂) and Ni₃V (D0₂₂) Phases

Abstract:

The effect of Ti addition on phase equilibria among Ni (A1), Ni3Al (L12) and Ni3V (D022) phases at 950 °C was investigated through TEM/EDS analysis on heat-treated alloys. The three-phase coexisting region of A1 + L12 + D022 was found to exist around the composition of Ni-4Al-19V (at. %) in the Ni-Al-V ternary system. With addition of Ti to the ternary system the three-phase coexisting region was shifted to the Ni-rich side. Ti partitioned most into the L12 phase and least into the A1 phase. These results suggest that the addition of Ti stabilizes the L12 and D022 phases against A1 phase, and raises the temperature of eutectoid reaction in the Ni3Al-Ni3V pseudo-binary system: A1 → L12 + D022.

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Materials Science Forum (Volumes 654-656)

Pages:

432-435

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.432

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Online since:

June 2010

Authors:

Eiki Hayashi, Satoru Kobayashi, Kazuhisa Sato, Toyohiko J. Konno, Yasuyuki Kaneno, Takayuki Takasugi

Keywords:

Alloying Effect, Eutectoid Reaction Temperature, Intermetallic Alloy, Phase Stability

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