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

页码：1194 / 1198

页数：5

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