Results 261 to 270 of about 33,673 (310)

Itinerant antiferromagnetism of TiAl alloys

Journal of Magnetism and Magnetic Materials, 1986
Abstract 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, I. Pop, A. Giurgiu, N. Farbaş   +3 more
openaire   +1 more source

Dislocation dissociation in TiAl alloys

Materials Science and Engineering: A, 1997
Two 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, H. Inui, K. Kishida, M. Yamaguchi   +3 more
openaire   +1 more source

Dynamic Recrystallization in Tial Alloys

MRS Proceedings, 1992
TiAl 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
openaire   +1 more source

TiAl-based alloys with nickel

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, Peter Rogl, André Perrin, Marcel Bohn, Walter Wolf, Raimund Podloucky, Yannick LeFriec, David Antoine   +7 more
openaire   +1 more source

Surface tension of γ-TiAl-based alloys

Journal of Materials Science, 2009
Within 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, T Lanata, N Sobczak, E Ricci, D Giuranno, R Novakovic, D HollandMoritz, I Egry   +7 more
openaire   +1 more source

TiAl alloys in commercial aircraft engines

Materials at High Temperatures, 2016
The 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, S. Nag, A. Suzuki, M. J. Weimer   +3 more
openaire   +1 more source

Tensile Ductility of Cast TiAl Alloys

Materials Science Forum, 2010
The microstructural characteristics and room temperature tensile ductility in some cast TiAl alloys were analyzed. It was found that grain refinement, either through Q&A treatment in boron-free alloys or through low dose of boron addition in beta solidifying alloys with lamellar microstructures, is not sufficient for good ductility. For cast alloys
Da Wei Hu, Xin Hua Wu
openaire   +1 more source

Combustion of TiAl alloy in nitrogen

Combustion, Explosion, and Shock Waves, 2015
It has been shown that Ti–Al–N ternary compounds, belonging to MAX phases (ceramic materials that can be processed as metals) can be produced by combustion of a granular powder of T65Yu35 (TiAl) alloy in nitrogen flow at a pressure close to atmospheric pressure. Combustion is accompanied by transfer of part of the aluminum through the gas phase.
B. Sh. Braverman, O. K. Lepakova, Yu. M. Maksimov, Yu. V. Tsybul’nik, V. D. Kitler   +4 more
openaire   +1 more source

Laser metal deposition of tial alloys

PICALO 2006: 2nd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication, 2006
Laser Metal Deposition (LMD) is a validated process for repairing aero engine parts and complete components. An increase of specific efficiency of aero engines is achieved by replacement of heavy parts out of Nickel Base Alloys in the HPC (High Pressure Compressor) and LPT (Low Pressure Turbine) sectors by lightweight parts out of TiAl Alloys in ...
Kelbassa, Ingomar, Weisheit, Andreas, Wissenbach, Konrad, Hermes, V.   +3 more
openaire   +1 more source

Physical properties of TiAl-base alloys

Scripta Materialia, 2001
Abstract The physical properties of TiAl alloys were studied and compared with that of currently used high temperature materials. TiAl exhibits lower thermal expansion, higher specific stiffness and higher specific heat. The thermal conductivity of TiAl is comparable to that of superalloys and steels and higher than that of Ti–6Al–4V.
W.J Zhang, B.V Reddy, S.C Deevi
openaire   +1 more source