Physical Metallurgy and Performance of the TNB and γ‐Md Alloys

Geometric modelling of elastic and elastic-plastic solids by separation of deformation energy and Prandtl operators

“…The method was applied to a titanium aluminide alloy Ti-42Al-8.5Nb used for applications in high temperature and high mechanical load areas. The bulk modulus-strain and shear modulusstrain curves were determined from experimental data gained in Appel et al (2014) . They are depicted in Fig.…”

Welding of unique and advanced ductile intermetallic alloys for high-temperature applications

“…The low density (high specific strength) of γ -TiAl makes it more attractive than Ni-based superalloys for a variety of structural components in critical aerospace applications [18, 19, 94-98]. The investigations resulted in better control of alloy composition, melt casting, powder processing, and microstructure through thermomechanical processing and innovative heat treatments [99-109]. Table 9 compares the properties of γ -TiAl with Ni-based superalloys.…”

The characteristics of TiAl-based alloys melted in graphite crucibles

“…Twice as light, the TiAl intermetallic alloys with much higher stiffness and relative strength as well as good creep and oxidation resistance fit perfectly in these demands. These properties predestine them for being used as substitutes for heavy nickel superalloys to manufacture the rotating aircraft engine components (low-pressure turbine blades and high-pressure compressor blades) operating at 600÷850°C, ensuring the improvement in performance and energy efficiency of engines and reduction in exhaust gas emissions [2–8].…”

“…The works on production of lightweight multi-component structural TiAl intermetallic alloys conducted for almost 40 years resulted in development of four consecutive generations of these alloys, containing in their chemical composition titanium, 42–49 at-% of aluminium, up to 4% of the plasticity-enhancing elements (chromium, manganese and vanadium), up to 10% of the creep and oxidation resistance-enhancing elements (niobium, tantalum, tungsten and molybdenum) and up to 1% of elements affecting grain refinement and increasing microstructure dispersion (silicon, carbon and boron) [3,5–8]. In the group of TiAl intermetallic alloys, special expectations concern the third-generation alloys designed for hot plastic working, called TNB alloys [3,5–9]. In addition to titanium, the chemical composition of these alloys includes approx.…”