The Effect of Molybdenum on the Phase Transformation Behavior of β/γ-TiAl alloys

被引：0

作者：

Mayer, Svea ^{[1
]}

Sailer, Christian ^{[1
]}

Schmoelzer, Thomas ^{[1
]}

Lindemann, Janny ^{[2
]}

Lippmann, Thomas ^{[3
]}

Takeyama, Masao ^{[4
]}

Staron, Peter ^{[5
]}

Clemens, Helmut ^{[1
]}

机构：

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

[2] Brandenburg Tech Univ Cottbus, Chair Phys Met & Mat Technol, D-03046 Cottbus, Germany

[3] DESY, Helmholtz Zentrum Geesthacht Outstn, Inst Mat Res, D-22607 Hamburg, Germany

[4] Tokyo Inst Technol, Dept Met & Ceram Sci, Tokyo 1528552, Japan

[5] Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, Germany

来源：

TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL II | 2012年

关键词：

Titanium aluminides (TiAI); molybdenum (Mo); martensitic transformation; microstructure; TITANIUM ALUMINIDE ALLOYS; MARTENSITIC-TRANSFORMATION; BETA;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Molybdenum is a strong beta-stabilizer and an important alloying element in gamma-TiAl based alloys. It offers the opportunity to suppress the formation of alpha(2)-phase and is used to generate so-called beta/gamma-alloys with improved hot working behavior. Unfortunately, the effect of Mo on the individual phases and their transition temperatures during slow heating and rapid cooling in the course of isothermal short and long-term heat treatments is not completely understood. In this paper, the results of investigations of two model alloys with different Mo contents by scanning electron microscopic and calorimetric studies are reported. Below a certain Mo content the high-temperature p-phase transforms into alpha'-martensite during water quenching. At higher Mo contents the high-temperature p-phase can be retained upon quenching, only an ordering reaction is observed. Subsequent tempering at 1000 degrees C leads to a strong grain refinement and hardness reduction.

引用

页码：1421 / 1424

页数：4