Results 251 to 260 of about 87,126 (299)

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

Alignment of the TiAl/Ti3Al lamellar microstructure in TiAl alloys by directional solidification

Materials Science and Engineering: A, 1997
Abstract By using an appropriately oriented seed from the TiAl–Si system, the TiAl/Ti 3 Al lamellar microstructure was aligned parallel to the growth direction for ingots having compositions of Ti–47Al, Ti–43Al–3Si, and Ti–46.5Al–3Nb–0.5Si (at.%). Directional solidification was performed in a floating zone furnace at growth rates between 5 and 40 mm ...
D.R Johnson, Y Masuda, H Inui, M Yamaguchi   +3 more
openaire   +1 more source

Formation of TiAl–Ti5Si3 and TiAl–Al2O3 in situ composites by combustion synthesis

Intermetallics, 2008
Abstract Preparation of TiAl–Ti5Si3 and TiAl–Al2O3 in situ composites with a broad range of composition was conducted by self-propagating high-temperature synthesis (SHS). Sample compacts containing Ti, Al, and TiO2 powders were employed to produce the TiAl–matrix composite reinforced by Al2O3, which was yielded through the displacement reaction of ...
C.L. Yeh, R.F. Li
openaire   +1 more source

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

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

Twin relationships in TiAl

Scripta Metallurgica, 1988
Analyse par microscopie electronique en transmission de la microstructure de l'alliage Ti-45% Al contenant 7,5% en volume de particules TiB 2 .
C.R. Feng, D.J. Michel, C.R. Crowe
openaire   +1 more source

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

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

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

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

Hardness measurement of (TiB2−TiAl)/TiAl symmetrically function gradient materials

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2002
(TiB2−TiAl)/TiAl symmetrically function gradient materials (FGM) were prepared by spark plasma sintering (SPS). Owing to the difference of the thermal expansion coefficients between TiB2 and TiAl, a compressive surface stress was introduced to the FGM by the thermal expansion mismatch.
Mei Bign-chu, Chen Yan-lin, He Li-ping, Yoshinari Miyamoto   +3 more
openaire   +1 more source