Results 261 to 270 of about 80,863 (300)

Friction and wear properties of TiAl and Ti2AlN/TiAl composites at high temperature

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2013
The high-temperature friction and wear properties of TiAl alloys and Ti2AlN/TiAl composites (TTC) in contact with nickel-based superalloy were studied. The results showed that, at 800 and 1 000 °C, the coefficient of the friction (COF) decreased with the increase of sliding velocity and the wear loss of the TTC decreased with the increase of volume ...
Dongli Sun, Tao Sun, Qing Wang, Xiuli Han, Linlin Guo   +4 more
openaire   +1 more source

Calculation of the γ-TiAl Lattice Resistance

Strength of Materials, 2019
The dislocation width and lattice resistance (Peierls stress) of a γ-TiAl alloy are calculated by the density ratio method. The lattice resistance is shown to decrease with the dislocation width. The relationship between the Peierls stress and dislocation width variation is defined by theoretical derivation.
Feng, R.C., Li, L.L., Li, H.Y., Wang, Z.M., Zhu, Z.X.   +4 more
openaire   +2 more sources

TEM observation of the initial oxidation stages of TiAl and TiAl-O.2Zr

Materials at High Temperatures, 2000
AbstractCoupon specimens of TiAl and TiAl–0.2 mass%Zr (TiAl–Zr) were oxidised at 1273 K in O2 of 0.013 Pa for up to 28.8 ks. The oxidised layers were investigated by SEM and TEM equipped with EDS, and characterised by XRD, XPS, AES and EPMA. The oxidised layers formed on both specimens consist mainly of an outer α-Al2O3 scale and an inner Al-depleted ...
S. Taniguchi, S. Fujimoto, T. Katoh, T. Shibata   +3 more
openaire   +1 more source

Interface Dislocations in TiAl

Materials Science Forum, 1998
The interfaces of lamellar structure in γ-phase TiAl are analysed. The misfit between 120° rotation domains with the ordered L1 0 lattice on the (111) plane, and the arrays of interface intrinsic dislocations observed by transmission electron microscopy are investigated.
Václav Paidar, S. Zghail, Alain Couret
openaire   +1 more source

?????????????????????????? ?????????????????????? ???????????????????????? ?????????????? ?????????????? ???? ???????????? ???????????????????????????? TiAl

2014
?????????????????????? ?????????????????????????? ?????????????????????? ?????????????????? ?? ???????????????????????? ?????????????? ???? ???????????? ???????????????????????????? TiAl. ?????????????? ?????????????? ????????????, ??????????, ?????????????????? ?? ?????????????????? ?????? ???? ?????????????? ????????????, ?????????????????? ?? ???????
openaire   +3 more sources

Oxidation of TiAl intermetallic

Powder Metallurgy and Metal Ceramics, 2007
The oxidation kinetics of TiAl intermetallic at 500–900 °C in air is studied using a gravimetric method, and the phase composition of the scale is studied using an x-ray phase analysis. At t > 600 °C, the kinetics of oxidation is described by a parabolic equation. The oxides TiO2 (rutile), γ-Al2O3, α-Al2O3, Ti2O3 are found in the scale.
V. G. Chuprina, I. M. Shalya
openaire   +1 more source

Diffusion-bonding of TiAl

Intermetallics, 1993
Abstract Diffusion-bonding of TiAl (48 at.% Al) using both solid-state and transient-liquid-phase (TLP) processes was studied. In solid-state diffusion-bonding, dynamic recrystallization which occurs at the bond-line during bonding is found to have a significant effect on improving bond strength.
P. Yan, E.R. Wallach
openaire   +1 more source

The plastic deformation of TiAl

Metallurgical transactions, 1974
The deformation substructure of TiAl (Llo type ordered lattice) tested in compression, and the factors determining it were investigated. Two types of dislocations take part in the plas-tic deformation, namely a/2 [110] and a/2 [Oil]. The latter type will disorder the Llo super-lattice and therefore would be expected to move in pairs as ...
D. Shechtman, M. J. Blackburn, H. A. Lipsitt   +2 more
openaire   +1 more source

?????????????? ?????????????????????? ?????????????? ?? ?????????????? ???? ?????????????????? ???????????????? ???????????? ???? ?????????????????????? ?????????????????????????????????? ???????????? ??-TiAl

2019
?? ???????????? ???????????????????? ?????????? ?????????????????????? ???????????????????? ?? ?????????????? ?? ???????? ???????????????? ???? ?????????????????????? ???????????????? ???????????? ???? ???????????????? ???????????????????????????????? ???????????? ??-TiAl. ???????????? ?????????? ?? ?????????????????????? ???????????????????? ??????????
openaire   +3 more sources

Machining of γ-TiAl

Advanced Engineering Materials, 1999
Knowledge of the machining parameters for titanium aluminides of the type γ-TiAl is essential for the acceptance and application of this new heat-resistant light-weight material for high performance components in automobile and aircraft engines. This work evaluates drilling, turning, sawing, milling, electroerosion, grinding, and high-pressure water ...
E. Aust, H.-R. Niemann
openaire   +1 more source