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

页码：692 / 696

页数：5

共 22 条

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