![]() ![]() Rosenberger (Eds.), Gamma titanium aluminides 2003, TMS, Warrendale, PA ( 2003) 89. He (Eds.), Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications, Mater. Leyens (Eds.), Structural Aluminides for Elevated Temperature Applications, TMS, Warrendale, PA ( 2008) 217. Gerling: Berg- und Hüttenmännische Monatshefte 151 ( 2006) 356. Peters (Eds.), Titanium and titanium alloys, WILEY-VCH, Weinheim, ( 2003) 351. Peters (Eds.), Titanium and titanium alloys, WILEY-VCH, Weinheim ( 2003) 89. Leyens (Eds.): Structural Aluminides for Elevated Temperature Applications, TMS, Warrendale, PA ( 2008). Rosenberger (Eds.): Gamma Titanium Aluminides 2003, TMS, Warrendale, PA ( 2003). Kelly: Paper presented at the 3 rd international Workshop on -TiAl Technologies, Bamberg, Germany (March 28–31, 2006). ![]() The results of tensile and creep tests conducted on forged and subsequently heat-treated TNM TM material are presented. With subsequent heat-treatments balanced mechanical properties can be achieved. Examples for the fabrication of -TiAl components employing a near conventional forging route are given. Due to high volume fractions of -phase at elevated temperatures the alloy can be hot-die forged under near conventional conditions, which means that conventional forging equipment with minor and inexpensive modifications can be used. In order to increase the deformation window a novel Nb and Mo containing -TiAl based alloy (TNM TM alloy) was developed, which solidifies via the β-phase and exhibits an adjustable β/B2-phase volume fraction. Because of the small “deformation window” hot-working of -TiAl alloys is a complex and difficult task and, therefore, isothermal forming processes are favoured. Finally, the effect of two-step heat-treatments on the microstructure and the mechanical properties is discussed. Then, the development of a “near conventional” hot-die forging route for this type of intermetallic material is described. ![]() In the beginning the main emphasis is put on the design of a -TiAl based alloy which exhibits excellent hot-workability. The present paper summarizes our progress in establishing a novel production technology for -TiAl components to be used in advanced aircraft engines. ![]()
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