Title of article
Alloying effects on the phase equilibria among Ni(A1), Ni3Al(L12) and Ni3V(D022) phases
Author/Authors
Kobayashi، نويسنده , , Satoru and Sato، نويسنده , , Kazuhisa and Hayashi، نويسنده , , Eiki and Osaka، نويسنده , , Toshihiro and Konno، نويسنده , , Toyohiko J. and Kaneno، نويسنده , , Yasuyuki and Takasugi، نويسنده , , Takayuki، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
8
From page
68
To page
75
Abstract
The effects of alloying elements (Ti, Nb, Ta, Cr, W, Re, Co and Si) on the phase equilibria among Ni (A1), Ni3Al (L12) and Ni3V (D022) phases were studied by means of microstructure observation and energy dispersive spectroscopy analysis on thin foils. It was found that the alloying elements can be classified into four categories: (a) Ti stabilizing the phases in the order: L12 > D022 > A1, (b) Nb and Ta stabilizing the phases: D022 > L12 > A1, (c) Cr, W, Re and Co stabilizing the phases: A1 > D022 > L12, (d) Si stabilizing the phases: Al > L12 > D022. The elements in the categories (a) and (b) raise the temperature of a eutectoid-type reaction (A1 → L12 + D022) while the elements in the category (c) reduce the temperature. The alloying effects were examined in terms of mixing enthalpy and electron concentration.
Keywords
D. Microsttucture , F. Electron microscopy , Transmission , A. Multiphase intermetallics , B. Phase diagrams
Journal title
Intermetallics
Serial Year
2012
Journal title
Intermetallics
Record number
1505281
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