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The Effect of Nb Addition on Phase Equilibria in the Ni-Rich Ni-Al-V Ternary System

Published online by Cambridge University Press:  18 January 2011

Eiki Hayashi ,
Satoru Kobayashi ,
Yasuyuki Kaneno  and
Takayuki Takasugi
Eiki Hayashi
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho Naka-ku, Sakai, Osaka 599-8531, JAPAN
Satoru Kobayashi
Affiliation:
Osaka Center for Industrial Materials Research, Institute for Materials Research, Tohoku University, 1-1 Gakuen-cho Naka-ku, Sakai, Osaka 599-8531, JAPAN
Yasuyuki Kaneno
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho Naka-ku, Sakai, Osaka 599-8531, JAPAN
Takayuki Takasugi
Affiliation:
Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho Naka-ku, Sakai, Osaka 599-8531, JAPAN Osaka Center for Industrial Materials Research, Institute for Materials Research, Tohoku University, 1-1 Gakuen-cho Naka-ku, Sakai, Osaka 599-8531, JAPAN
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Abstract

The effect of Nb addition on phase equilibria among Ni (A1), Ni3Al (L12) and Ni3V (D022) phases was investigated in the Ni-rich Ni-Al-V ternary system. The addition of Nb to the Ni-Al-V ternary system shifts the three-phase coexisting region of A1 + L12 + D022 towards the Ni-rich side at 950 ºC. Nb is partitioned into the D022 phase more strongly than the A1 and L12 phases. These results suggest that the addition of Nb stabilizes the D022 phase against the A1 and L12 phases in the systems. The alloying element raises the temperature of a eutectoid-like reaction (A1→L12+D022) by ~30 ºC in the vertical section of Ni-Al-V ternary system at 75 at. % Ni.

Keywords

Nicompoundphase equilibria
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1295: Symposium N – Intermetallic-Based Alloys for Structural and Functional Applications , 2011 , mrsf10-1295-n05-28
Copyright
Copyright © Materials Research Society 2011

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References

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