Thermodynamic description of niobium-rich γ-TiAl alloys

被引：7
作者：
Liu, Yuhong [1 ]
Gamsjaeger, Ernst [1 ]
Clemens, Helmut [2 ]
机构：
[1] Montan Univ Leoben, Inst Mech, A-8700 Leoben, Austria
[2] Montan Univ Leoben, Dept Phys Met & Mat Testing, A-8700 Leoben, Austria
来源：
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2011年 / 102卷 / 06期
基金：
奥地利科学基金会;
关键词：
gamma-TiAl alloy; Niobium additions; Phase diagram; Thermodynamic assessment; PHASE-EQUILIBRIA; AL-NB; REEVALUATION; SYSTEM; MO;
D O I：
10.3139/146.110514
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Based on recently reported experimental data, the thermodynamic details of the Ti-Al-Nb system, relevant for the design of engineering gamma-TiAl based alloys, have been reinvestigated. Thermodynamic functions for the phases of interest (alpha/alpha(2), beta/beta(0) and gamma) are optimized by applying the Parrot module of the software package ThermoCalc. By using the thermodynamic parameters assessed in this work, phase equilibria can be calculated up to a niobium mole fraction of 0.1. The modeling results agree reasonably well with experimental observations as shown by depicting the Ti-45 at.%Al-Nb isopleth.
引用
收藏
页码：692 / 696
页数：5
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