Results 171 to 180 of about 3,427 (205)

Effect of alloying elements on the behaviour of TiAl-based alloys

Intermetallics, 2014
Abstract TiAl-based alloys containing Nb, Mo and Cr have been produced by induction melting both under an Ar atmosphere and in vacuum. Fracture toughness and isothermal oxidation tests at 900 °C have been performed on a number of alloys in order to evaluate the effect of alloying elements on both fracture toughness and hot corrosion.
BROTZU, Andrea, FELLI, Ferdinando, PILONE, Daniela   +2 more
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Segregation of alloying elements in a fully lamellar TiAl alloy

Scripta Materialia, 2001
Abstract Alloying elements strongly segregate at ledges in the crept microstructure of Ti 48.55 Al 47 Cr 2 Nb 1 Ta 0.8 W 0.2 B 0.15 Si 0.3 alloy. The amount of segregation is related to the stress concentration and distorted lattice caused by the applied stress. The segregation can stabilize α 2 phase and improve creep resistance.
X.-W Du, J.N Wang, J Zhu
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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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The site occupancies of alloying elements in TiAl and Ti3Al alloys

Acta Materialia, 1999
The site occupancies of V, Cr, Mn, Fe, Ni, Zr, Nb, Mo, Ta, Ga and Sn (1-5 at.%) in TiAl alloys with different compositions, and in Ti3Al with the compositions of Ti-26 at.%Al-(1-2 at.%)X, were measured by the atom location channelling enhanced microanalysis (ALCHEMI) method.
Y.L. Hao, D.S. Xu, Y.Y. Cui, R. Yang, D. Li   +4 more
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TiAl alloys in commercial aircraft engines

Materials at High Temperatures, 2016
The present article will describe aspects of the science and technology of titanium aluminide (TiAl) alloy system and summarise the low and high temperature mechanical and environmental properties exhibited by different alloy generations. In terms of processing developments, conventional gravity casting and near net shape casting would be discussed in ...
B. P. Bewlay, S. Nag, A. Suzuki, M. J. Weimer   +3 more
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Phase transformations in TiAl based alloys

Acta Materialia, 2005
Microstructural characteristics of a fully lamellar Ti49Al47Cr2Nb2 alloy have been investigated in different annealed conditions by quantitative transmission electron microscopy. Statistical analyses have yielded clear information about the γ–γ interfaces, the respective orientation groups of the γ phase, and the distribution of orientational variants.
Slim Zghal, Marc Thomas, Shigehisa Naka, Alphonse Finel, Alain Couret   +4 more
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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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Mechanical behavior of TiAl alloys

Science China Technological Sciences, 2023
HengGao Xiang, Yang Chen, ZhiXiang Qi, Gong Zheng, FengRui Chen, YueDe Cao, Xu Liu, Bing Zhou, Guang Chen   +8 more
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Investigation of point defects in TiAl alloy

Journal of Computer-Aided Materials Design, 1999
The many-body potentials of TiAl alloy were constructed by empirical fitting to the properties of the L10TiAl tetragonal phase and the pressure–volume relationship. The properties and stable configurations for point defects and their aggregates, and the activation energies for vacancy migration are simulated in TiAl intermetallic compounds using ...
Baoyi Wang, Tianmin Wang, Zhouwen Rong, Fei Gao, Qiang Gu   +4 more
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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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