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Cyclic-oxidation behavior of TiAl and of TiAl alloys
Oxidation of Metals, 1993The cyclic-oxidation behavior of (in w/o) Ti-36Al, Ti-35Al-0.1C, Ti-35Al-1.4V-0.1C and Ti-35Al-5Nb-0.1C was studied between 800 and 1000° C in air. A few experiments were also performed in oxygen. Scale spallation after oxidation in air occurs during cooling on TiAl, TiAl-C, and TiAl-V at or close to the metal/scale interface when a critical scale ...
S. Becker, M. Sch�tze, A. Rahmel
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Intermetallics, 1998
Abstract The growth of TiAl alloys over a range of Al concentrations has been considered for ingots processed by the floating zone technique. For Al-rich alloys, single crystals of γ-TiAl cannot be grown for compositions below Ti-54 at% Al since a banded microstructure forms due to the limitations imposed by the L + α → γ peritectic reaction. However,
D.R. Johnson, H. Inui, M. Yamaguchi
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Abstract The growth of TiAl alloys over a range of Al concentrations has been considered for ingots processed by the floating zone technique. For Al-rich alloys, single crystals of γ-TiAl cannot be grown for compositions below Ti-54 at% Al since a banded microstructure forms due to the limitations imposed by the L + α → γ peritectic reaction. However,
D.R. Johnson, H. Inui, M. Yamaguchi
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MRS Proceedings, 1992
The forging and rolling behavior of binary Ti-48Al and ternary Ti-48Al-2Cr (at-%) on laboratory and industrial scale is investigated. Arc-melted and cast ingots are used for forging operations. In order to enable the determination of optimized forging and rolling conditions the plastic flow behavior was examined for low ( −2 s −1 ) and high (1 s −1 ...
K. Wurzwallner +4 more
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The forging and rolling behavior of binary Ti-48Al and ternary Ti-48Al-2Cr (at-%) on laboratory and industrial scale is investigated. Arc-melted and cast ingots are used for forging operations. In order to enable the determination of optimized forging and rolling conditions the plastic flow behavior was examined for low ( −2 s −1 ) and high (1 s −1 ...
K. Wurzwallner +4 more
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Mechanical Properties of TiAl and TiAl-Base Alloys
1996Titanium 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.
Kyosuke Kishida +4 more
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Superconductivity of α-TiAl alloys
Physica C: Superconductivity, 2000Abstract The superconducting transition temperature Tc of α TiAl alloys has been measured up to 10 atomic percentage of Al. Tc monotonously increases with a tendency to saturation for high Al content.
Liu Shumei +5 more
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Isothermal oxidation of TiAl alloy
Metallurgical and Materials Transactions A, 2001Isothermal 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)
R. G. Reddy, X. Wen, M. Divakar
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Solidification of TiAl-based alloys
MRS Proceedings, 2008AbstractTitanium aluminides containing high niobium additions emerged as an attractive alloy family for automotive and aero-engine applications. Their processing by near net shape casting is rather demanding, not only due to easy contamination but also due to the fact that microstructure formation during solidification and subsequent solid state ...
Ulrike Hecht +5 more
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Rapidly Solidified Binary Tial Alloys
MRS Proceedings, 1986AbstractMelt spinning has been carried out on binary TiAl alloys at three Ti/Al ratios. Antiphase domains were observed in one ribbon specimen, but no significant disordering was induced by the rapid solidification as indicated by X-ray and electron diffraction analyses.
S. C. Huang +2 more
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TiAl formation by mechanical alloying
Materials Science and Engineering: A, 1992Abstract 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.
C Suryanarayana, R Sundaresan, F.H Froes
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Fatigue properties of TiAl alloys
Intermetallics, 2005Abstract 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
Gilbert Hénaff, Anne-Lise Gloanec
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