Results 341 to 350 of about 1,402,468 (402)

Isothermal oxidation of TiAl alloy

Metallurgical and Materials Transactions A, 2001
Isothermal oxidation behavior of Ti-48.6 at. pct Al alloy was studied in pure dry oxygen over the temperature range 850 °C to 1000 °C. The oxidation was essentially parabolic at all temperatures with significant increase in the rate at 1000 °C. Effective activation energy of 404 kJ/mol was deduced. The oxidation products were a mixture of TiO2 (rutile)
Ramana G. Reddy, X. Wen, M. Divakar
openaire   +2 more sources

TiAl formation by mechanical alloying

Materials Science and Engineering: A, 1992
Abstract 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.
Francis H. Froes, C. Suryanarayana, R Sundaresan   +2 more
openaire   +2 more sources

Selective Electron Beam Melting of TiAl Alloy: Metallurgical Defects, Tensile Property, and Determination of Process Window

Advanced Engineering Materials, 2020
Selective electron beam melting (SEBM) is a promising method to manufacture complex titanium aluminide (TiAl) alloy parts. Herein, the effects of beam current, scanning speed and energy density on surface appearance, porosity, and Al loss of Ti–47Al–2Cr ...
Hangyu Yue, H. Peng, Ruifeng Li, Yong-Jun Su, Yong Zhao, K. Qi, Yuyong Chen   +6 more
semanticscholar   +1 more source

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.
Traian Petrisor, A. Giurgiu, N. Farbaş, I. Pop   +3 more
openaire   +2 more sources

Tribological Properties of γ-TiAl Alloy Fretting against Nickel-Based Superalloy at Elevated Temperature

Tribology Transactions
The tribological properties of γ-TiAl alloys under sliding condition have been well established, but the mechanisms for fretting wear, especially at elevated temperature, remain to be further clarified.
Yulei Yang, Yuji Chen, Yangzhen Gesang, Minghui Pan, Yi Liang   +4 more
semanticscholar   +1 more source

Fatigue properties of TiAl alloys

Intermetallics, 2005
Abstract 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
Anne-Lise Gloanec, Gilbert Hénaff
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Mechanical Properties of TiAl and TiAl-Base Alloys

1996
Titanium forms three intermetallic compounds with aluminum. They are Ti3AI, TiAl and Al3Ti with crystal structures of the DO19, L10 and D022 types, respectively. They are superlattice structures based on geometrically close-packed h.c.p. and f.c.c. structures.
Haruyuki Inui, David R. Johnson, Kyosuke Kishida, Shigenobu Yokoshima, Masaharu Yamaguchi   +4 more
openaire   +2 more sources

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.
Václav Paidar, Kyosuke Kishida, Masaharu Yamaguchi, Haruyuki Inui   +3 more
openaire   +2 more sources

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.
S. Krishnamurthy, Dennis M. Dimiduk, D.S. Lee   +2 more
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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 ...
Marcel Bohn, André Perrin, Yannick LeFriec, Yannick LeFriec, Walter Wolf, Peter Rogl, David Antoine, David Antoine, Josef Bauer, Josef Bauer, Raimund Podloucky   +10 more
openaire   +2 more sources