Results 241 to 250 of about 415,515 (294)

Superconductivity of α-TiAl alloys

Physica C: Superconductivity, 2000
Abstract The superconducting transition temperature Tc of α TiAl alloys has been measured up to 10 atomic percentage of Al. Tc monotonously increases with a tendency to saturation for high Al content.
Liu Shumei, Jing Xiunian, Lu Li, Li Shanlin, J.J. Lin, Zhang Dian-lin   +5 more
openaire   +1 more source

Solidification of TiAl-based alloys

MRS Proceedings, 2008
AbstractTitanium 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, D. Daloz, J. Lapin, A. Drevermann, V.T. Witusiewicz, J. Zollinger   +5 more
openaire   +1 more source

Review of alloy and process development of TiAl alloys

Intermetallics, 2006
Abstract The improved understanding of the factors that control microstructure and properties of TiAl alloys is reviewed together with current work aimed at developing both wrought and cast products. It is suggested that the choice of alloy composition is perhaps far simpler than the complex literature would suggest and the factors that underlie ...
Xinhua Wu
exaly   +2 more sources

Alloying mechanism of beta stabilizers in a TiAl alloy

Metallurgical and Materials Transactions A, 2001
The effects of beta stabilizers such as Fe, Cr, V, and Nb on the microstructures and phase constituents of Ti52Al48-xM (x=0, 1.0, 2.0, 4.0, or 6.0 at. pct and M=Fe, Cr, V, and Nb) alloys were studied. The dependence of the tensile properties and creep resistance of TiAl on the alloying elements, especially the formation of B2 phase, was investigated ...
Fu-Sheng Sun, Chun-Xiao Cao, Ming-Gao Yan, Seung-Eon Kim, null Yong-Tailee   +4 more
openaire   +1 more source

Improving the oxidation resistance of TiAl-alloys with fluorine

Journal of Alloys and Compounds, 2008
Abstract The technical TiAl-alloy γ-MET (Ti–46.5Al–4(Cr, Nb, Ta, B)) was oxidised thermocyclically (24 h-cycle-test) at 900 °C in wet and dry air. In this paper results of untreated and fluorine treated TiAl-samples are presented. Their oxidation behaviour will be shown. Several methods were used to apply the halogens to the surface, e.g.
Donchev, A., Richter, E., Schuetze, M., Yankow, R. A.   +3 more
openaire   +3 more sources

Forming of γ-TiAl-Alloys

MRS Proceedings, 1992
The forging and rolling behavior of binary Ti-48Al and ternary Ti-48Al-2Cr (at-%) on laboratory and industrial scale is investigated. Arc-melted and cast ingots are used for forging operations. In order to enable the determination of optimized forging and rolling conditions the plastic flow behavior was examined for low ( −2 s −1 ) and high (1 s −1 ...
K. Wurzwallner, H. Clemens, P. Schretter, A. Bartels, C. Koeppe   +4 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

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

Strength and ductility in TiAl alloys

Intermetallics, 1998
Abstract Tensile behavior of two-phase TiAl alloys at room temperature (RT) is analyzed for duplex and lamellar microstructural forms. The Hall-Petch relationship with high constants in fully-lamellar material is explained as a combined function of grain-size and deformation-anisotropy.
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