Alloying effects on the phase equilibria among Ni(A1), Ni3Al(L12) and Ni3V(D022) phases

被引：23
|
作者：
Kobayashi, Satoru [1 ]
Sato, Kazuhisa [1 ]
Hayashi, Eiki [2 ]
Osaka, Toshihiro [2 ]
Konno, Toyohiko J. [1 ]
Kaneno, Yasuyuki [2 ]
Takasugi, Takayuki [1 ,2 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Kansai Ctr Ind Mat Res, Naka Ku, Sakai, Osaka 5998531, Japan
[2] Osaka Prefecture Univ, Grad Sch Engn, Dept Mat Sci, Naka Ku, Sakai, Osaka 5998531, Japan
来源：
INTERMETALLICS | 2012年 / 23卷
关键词：
Multiphase intermetallics; Phase diagrams; Microsttucture; Electron microscopy Transmission; PACKED NI3X X; MECHANICAL-PROPERTIES; AL; MICROSTRUCTURE; BEHAVIOR; ELEMENTS; TI;
D O I：
10.1016/j.intermet.2011.12.008
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effects of alloying elements (Ti, Nb, Ta, Cr, W, Re, Co and Si) on the phase equilibria among Ni (A1), Ni3Al (L1(2)) and Ni3V (D0(22)) 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: L1(2) > D0(22) > A1, (b) Nb and Ta stabilizing the phases: D0(22) > L1(2) > A1, (c) Cr, W, Re and Co stabilizing the phases: Al > D0(22) > L1(2), (d) Si stabilizing the phases: Al > L1(2) > D0(22). The elements in the categories (a) and (b) raise the temperature of a eutectoid-type reaction (A1 -> L1(2) + D0(22)) while the elements in the category (c) reduce the temperature. The alloying effects were examined in terms of mixing enthalpy and electron concentration. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：68 / 75
页数：8
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