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Solidification of TiAl-based alloys
MRS Proceedings, 2008AbstractTitanium aluminides containing high niobium additions emerged as an attractive alloy family for automotive and aero-engine applications. Their processing by near net shape casting is rather demanding, not only due to easy contamination but also due to the fact that microstructure formation during solidification and subsequent solid state ...
Ulrike Hecht +5 more
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Rapidly Solidified Binary Tial Alloys
MRS Proceedings, 1986AbstractMelt spinning has been carried out on binary TiAl alloys at three Ti/Al ratios. Antiphase domains were observed in one ribbon specimen, but no significant disordering was induced by the rapid solidification as indicated by X-ray and electron diffraction analyses.
S. C. Huang +2 more
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TiAl formation by mechanical alloying
Materials Science and Engineering: A, 1992Abstract Formation of equiatomic TiAl has been achieved through mechanical alloying of powders of two brittle compounds Al 3 Ti and TiH 2 . The influence of milling time, compaction of the powder by hot isostatic pressing, and elevated temperature exposure on the species and proportion of phases formed has been determined.
C Suryanarayana, R Sundaresan, F.H Froes
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Fatigue properties of TiAl alloys
Intermetallics, 2005Abstract The fatigue properties of TiAl alloys, namely fatigue life, cyclic stress–strain behaviour and fatigue crack growth resistance are reviewed in the present paper. The influence of different parameters (microstructure, defects, temperature and environment) on these properties is examined. Finally, some considerations on the fatigue reliability
Gilbert Hénaff, Anne-Lise Gloanec
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Itinerant antiferromagnetism of TiAl alloys
Journal of Magnetism and Magnetic Materials, 1986Abstract Magnetic susceptibility measurements of TiAl alloys are reported. Aluminium, by alloying, acts on the Neel temperature of pure titanium giving rise to a complicated phase diagram. A theoretical model, based on the itinerant antiferromagnetism model of chromium is proposed in order to explain the magnetic phase diagram of TiAl alloys.
T. Petrişor +3 more
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Dislocation dissociation in TiAl alloys
Materials Science and Engineering: A, 1997Two superdislocation configurations consisting in an asymmetric planar dissociation on one octahedral plane, and symmetric wedge shape dissociation on two inclined octahedral planes are analysed using anisotropic elasticity. The presented results can be used to evaluated the stacking fault energies from the measured widths of dissociation.
V. Paidar +3 more
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Dynamic Recrystallization in Tial Alloys
MRS Proceedings, 1992TiAl alloys with Cr, V, and Nb additions show promise as high temperature materials due to their high temperature strength and modulus. Dynamic recrystallization has been shown to be important for the processing and superplastic forming of these materials.
D.S. Lee, D.M. Dimiduk, S. Krishnamurthy
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Intermetallics, 1996
Abstract The alloying potential of nickel as a minor constituent has been investigated in TiAl-based intermetallics with respect to its constitutional ability to provide the necessary microstructures for higher ductility and low fracture toughness. Six alloys (Ti0.60Al0.40)1 − x1Nix1 and (Ti0.56Al0.44)1 − x2Nix2 with x1.2 = 0.01, 0.02 and 0.05 have ...
Josef Bauer +7 more
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Abstract The alloying potential of nickel as a minor constituent has been investigated in TiAl-based intermetallics with respect to its constitutional ability to provide the necessary microstructures for higher ductility and low fracture toughness. Six alloys (Ti0.60Al0.40)1 − x1Nix1 and (Ti0.56Al0.44)1 − x2Nix2 with x1.2 = 0.01, 0.02 and 0.05 have ...
Josef Bauer +7 more
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Surface tension of γ-TiAl-based alloys
Journal of Materials Science, 2009Within the Integrated Project IMPRESS, funded by the EU, a concerted action was taken to determine the thermophysical properties of a c-TiAl-based alloys, suitable for casting of large turbine blades for aeroengines and stationary gas turbines. The challenge was to develop a castable alloy, free of grain refiners and susceptible to heat treatment ...
R Nowak +7 more
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TiAl alloys in commercial aircraft engines
Materials at High Temperatures, 2016The present article will describe aspects of the science and technology of titanium aluminide (TiAl) alloy system and summarise the low and high temperature mechanical and environmental properties exhibited by different alloy generations. In terms of processing developments, conventional gravity casting and near net shape casting would be discussed in ...
B. P. Bewlay +3 more
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