Results 261 to 270 of about 134,655 (313)

Thermal formation of vacancies in TiAl

Physical Review B, 1994
The formation of thermal vacancies, which is a key issue with respect to the high-temperature properties of ordered intermetallic compounds, was studied in \ensuremath{\gamma}-TiAl by means of positron lifetime spectroscopy between ambient temperature and 1400 K.
, Brossmann, , Würschum, , Badura, , Schaefer   +3 more
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Pathways for microstructural development in TiAl

Materials Science and Engineering, 1988
Abstract Rapid solidification processing (RSP) of intermetallic alloys can provide alternative solidification paths and lead to the formation of metastable products. For the intermetallic TiAl with an equilibrium L10 structure, RSP has yielded a metastable hexagonal close packed (h.c.p.) α-Ti phase in both fine powder and melt-spun ribbon.
J.A. GRAVES, L.A. BENDERSKY, F.S. BIANCANIELLO, J.H. PEREPEZKO, W.J. BOETTINGER   +4 more
openaire   +1 more source

Coatings for TiAl

MRS Bulletin, 1994
The intermetallic compound, TiAl, and materials based on it have been receiving considerable attention because of their high specific strengths at elevated temperatures. Their mechanical properties are being extensively studied, with a view to application in aircraft or automobile engines.
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Deformation Behavior of TiAl Compounds with the TiAl/Ti3Al Lamellar Microstructure

1992
In the last few years, substantial progress has been made in our understanding of the microstructure and the deformation and fracture behavior of TiAl compounds. We have made uniaxial tension tests of specimens of the TiAl compounds whose lamellar orientation is controlled so that shear deformation occurs parallel to the lamellar boundaries only in the
M. Yamaguchi, H. Inui
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

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

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

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
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2019
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openaire   +3 more sources

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