Results 271 to 280 of about 6,142 (314)

Tensile Ductility of Cast TiAl Alloys

Materials Science Forum, 2010
The microstructural characteristics and room temperature tensile ductility in some cast TiAl alloys were analyzed. It was found that grain refinement, either through Q&A treatment in boron-free alloys or through low dose of boron addition in beta solidifying alloys with lamellar microstructures, is not sufficient for good ductility. For cast alloys
Da Wei Hu, Xin Hua Wu
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Combustion of TiAl alloy in nitrogen

Combustion, Explosion, and Shock Waves, 2015
It has been shown that Ti–Al–N ternary compounds, belonging to MAX phases (ceramic materials that can be processed as metals) can be produced by combustion of a granular powder of T65Yu35 (TiAl) alloy in nitrogen flow at a pressure close to atmospheric pressure. Combustion is accompanied by transfer of part of the aluminum through the gas phase.
B. Sh. Braverman, O. K. Lepakova, Yu. M. Maksimov, Yu. V. Tsybul’nik, V. D. Kitler   +4 more
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Laser metal deposition of tial alloys

PICALO 2006: 2nd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication, 2006
Laser Metal Deposition (LMD) is a validated process for repairing aero engine parts and complete components. An increase of specific efficiency of aero engines is achieved by replacement of heavy parts out of Nickel Base Alloys in the HPC (High Pressure Compressor) and LPT (Low Pressure Turbine) sectors by lightweight parts out of TiAl Alloys in ...
Kelbassa, Ingomar, Weisheit, Andreas, Wissenbach, Konrad, Hermes, V.   +3 more
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Physical properties of TiAl-base alloys

Scripta Materialia, 2001
Abstract The physical properties of TiAl alloys were studied and compared with that of currently used high temperature materials. TiAl exhibits lower thermal expansion, higher specific stiffness and higher specific heat. The thermal conductivity of TiAl is comparable to that of superalloys and steels and higher than that of Ti–6Al–4V.
W.J Zhang, B.V Reddy, S.C Deevi
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DRILLING OF INTERMETALLIC ALLOYS GAMMA TIAL

AIP Conference Proceedings, 2011
Due to their high strength/weight ratio and resistance to corrosion and wear, superalloys such as gamma TiAl or Inconel 718 appear as the best choice for the high mechanical/thermal demands in the vicinity of the combustion chamber of aircraft engines.
A. Beranoagirre, D. Olvera, L. N. López de Lacalle, G. Urbicain, Francisco Chinesta, Yvan Chastel, Mohamed El Mansori   +6 more
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Twinned Dendrites in Tial Alloys

Materials Characterization, 2023
Fu qiang Zhang, Yi Song, Gengwu Ge, Leming Xu, Xianfei Ding, Jianping He, Yongfeng Liang, Junpin Lin   +7 more
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Characterization of laser-deposited TiAl alloys

Scripta Materialia, 2001
Microstructure of TiAl produced by Laser Engineered Net Shaping (LENS) has been characterized using optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It has been shown that the substrate has a significant effect on the microstructure deposited. Depending on operational parameters, either equiaxed {gamma}-
X.D Zhang, C Brice, D.W Mahaffey, H Zhang, K Schwendner, D.J Evans, H.L Fraser   +6 more
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Carbide precipitation in γ-TiAl alloys

Scripta Metallurgica et Materialia, 1992
Carbide precipitation in gamma-TiAl is observed and found to involve the formation of coherent, rod-shaped perovskite precipitates as a metastable transition phase. At temperatures above 750 deg C, the formation of plate-shaped H-phase particles on dislocations and grain boundaries is accompanied by dissolution of the perovskite precipitate dispersions.
S. Chen, P.A. Beaven, R. Wagner
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8.5Nb–TiAl alloy with fine grains

Journal of Alloys and Compounds, 2003
Abstract One 8.5Nb–TiAl-based alloy, whose nominal chemical composition is Ti–45Al–8.5Nb–0.3W–0.3B–0.05Y at% (TAWBY) was presented, including various annealing treatments after cladding insulting forged with homogeneous microstructures. This alloy was developed as cast grains with the size of 25 μm whereas the β (B2) phase exists in TAWBY alloy.
Y.Q Yan, L Zhou, W.S Wang, Y.N Zhang
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Plasticity of γ-TiAl alloys

2018
Gamma titanium aluminide alloys are emerging as a lightweight replacement to nickel superalloys, with current application in turbine stages of aero-engines, as well as in high performance automobiles and potentially the nuclear industry. The lack of toughness of its two constitutive intermetallic phases, γ-TiAl and α2-Ti3Al, prevents a conventional ...
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