Phase transformations in high niobium and carbon containing γ-TiAl based alloys

被引：76
|
作者：
Chladil, H. F.
Clemens, H.
Leitner, H.
Bartels, A.
Gerling, R.
Schimansky, F. -P.
Kremmer, S.
机构：
[1] Univ Leoben, Dept Phys Met & Mat Testing, A-8700 Leoben, Austria
[2] Tech Univ Hamburg, D-21073 Hamburg, Germany
[3] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany
[4] Bohler Schmiedetech GmbH & CoKG, A-8605 Kapfenberg, Austria
来源：
INTERMETALLICS | 2006年 / 14卷 / 10-11期
关键词：
titanium aluminides; based on TiAl; phase transformation; phase diagram; prediction;
D O I：
10.1016/j.intermet.2005.11.016
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：
Phase transformations and phase transition temperatures in Ti-45 at.%Al alloyed with different amounts of niobium and carbon were investigated. Scanning electron microscopy, electron back-scattered diffraction and differential scanning calorimetry were applied for the characterisation of the prevailing phases and phase transformations. Both, niobium and carbon display a tendency to increase the eutectoid temperature, with carbon showing the stronger effect. In contrast, the influence of niobium and carbon on the alpha-transus temperature is rather small. Thermodynamic equilibrium calculations were performed with the aid of the software ThermoCalc and MatCalc on the basis of a commercially available TiAl database. Partly, the calculated data show significant differences when compared to experimental results. (C) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1194 / 1198
页数：5
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