In and ex situ investigations of the β-phase in a Nb and Mo containing γ-TiAl based alloy

被引：198

作者：

Clemens, H. ^{[1
]}

Chladil, H. F. ^{[1
]}

Wallgram, W. ^{[1
]}

Zickler, G. A. ^{[2
]}

Gerling, R. ^{[3
]}

Liss, K. -D. ^{[4
]}

Kremmer, S. ^{[5
]}

Guether, V. ^{[6
]}

Smarslyg, W. ^{[7
]}

机构：

[1] Montanuniversitat, Dept Phys Met & Mat Testing, A-8700 Leoben, Austria

[2] Christian Doppler Lab Early Stages Precipitat, A-8700 Leoben, Austria

[3] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany

[4] Australian Nucl Sci & Technol Org, Bragg Inst, Lucas Heights, NSW 2234, Australia

[5] Bohler Schmiedetech GmbH&Co KG, A-8605 Kapfenberg, Austria

[6] GfE Met & Mat GmbH, D-90431 Nurnberg, Germany

[7] MTV Aero Engines GmbH, D-80995 Munich, Germany

来源：

INTERMETALLICS | 2008年 / 16卷 / 06期

关键词：

titanium aluminides; based on TiAl; alloy design; phase identification; texture; phase diagram; prediction;

D O I：

10.1016/j.intermet.2008.03.008

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：

In beta-stabilized Ti-43Al-4Nb-1Mo-0.1B alloy (composition in atomic percent) the correlation between the occurrence of beta-phase and temperature was analyzed experimentally and compared to thermodynamic calculations. Results from in situ high-energy X-ray diffraction, texture measurements, heat treatments, scanning electron microscopy, and temperature-dependent flow stress measurements were used to study the evolution of the beta-phase with temperature. Thermodynamic calculations based on the CALPHAD method were applied to correlate the phases developed in the beta-solidifying TiAl based alloy under investigation. This alloy is characterized by an adjustable beta-phase volume fraction at temperatures where hot-work processes such as forging and rolling are conducted. Due to a high volume fraction of beta-phase at elevated temperatures the hot-extruded alloy can be forged under near conventional conditions. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：827 / 833

页数：7

共 35 条

[1]

[Anonymous], TI 2007 SCI TECHNOLO

[2]

[Anonymous], 2003, GAMMA TITANIUM ALUMI

[3] Nano-scale design of TiAl alloys based on β-phase decomposition [J].

Appel, F ;

Oehring, M ;

Paul, JDH .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (05) :371-376

[4]

Appel F, 2000, ADV ENG MATER, V2, P699, DOI 10.1002/1527-2648(200011)2:11<699::AID-ADEM699>3.0.CO

[5]

2-J

[6] Novel design concepts for gamma-base titanium aluminide alloys [J].

Appel, F ;

Oehring, M ;

Wagner, R .

INTERMETALLICS, 2000, 8 (9-11) :1283-1312

[7] Creep behavior of TiAl alloys with enhanced high-temperature capability [J].

Appel, F ;

Paul, JDH ;

Oehring, M ;

Fröbel, U ;

Lorenz, U .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34A (10) :2149-2164

[8]

Appel F., 2003, Titanium and Titanium Alloys, P89

[9] Deformation behavior of differently processed γ-titanium aluminides [J].

Bartels, A ;

Kestler, H ;

Clemens, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 :153-162

[10] The decomposition of the beta phase in Ti-44Al-8Nb and Ti-44Al-4Nb-4Zr-0.2Si alloys [J].

Cheng, TT ;

Loretto, MH .

ACTA MATERIALIA, 1998, 46 (13) :4801-4819

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