Results 211 to 220 of about 1,367,716 (264)

Dynamic Recrystallization in Tial Alloys

MRS Proceedings, 1992
TiAl alloys with Cr, V, and Nb additions show promise as high temperature materials due to their high temperature strength and modulus. Dynamic recrystallization has been shown to be important for the processing and superplastic forming of these materials.
S. Krishnamurthy, Dennis M. Dimiduk, D.S. Lee   +2 more
openaire   +2 more sources

TiAl-based alloys with nickel

Intermetallics, 1996
Abstract The alloying potential of nickel as a minor constituent has been investigated in TiAl-based intermetallics with respect to its constitutional ability to provide the necessary microstructures for higher ductility and low fracture toughness. Six alloys (Ti0.60Al0.40)1 − x1Nix1 and (Ti0.56Al0.44)1 − x2Nix2 with x1.2 = 0.01, 0.02 and 0.05 have ...
Marcel Bohn, André Perrin, Yannick LeFriec, Yannick LeFriec, Walter Wolf, Peter Rogl, David Antoine, David Antoine, Josef Bauer, Josef Bauer, Raimund Podloucky   +10 more
openaire   +2 more sources

Alloy and process development of TiAl

Journal of Materials Science, 2004
The development of cast TiAl-based components for the automotive industry and the possibility of wrought components for applications in gas turbines are clear indications that these alloys are maturing as materials for engineering components. There are however problems in the cost of manufacture and in the properties of these alloys.
Xinhua Wu, M.H. Loretto, D. Hu
openaire   +2 more sources

Mechanical Properties of the TiAl IRIS Alloy

Metallurgical and Materials Transactions A, 2016
This paper presents a study of the mechanical properties at room and high temperature of the boron and tungsten containing IRIS alloy (Ti-48Al-2W-0.08B at. pct). This alloy was densified by Spark Plasma Sintering (SPS). The resultant microstructure consists of small lamellar colonies surrounded by γ regions containing B2 precipitates. Tensile tests are
Marc Thomas, Jean-Philippe Monchoux, Thomas Voisin, Thomas Voisin, Alain Couret, Christophe Deshayes   +5 more
openaire   +4 more sources

Alloying mechanism of beta stabilizers in a TiAl alloy

Metallurgical and Materials Transactions A, 2001
The effects of beta stabilizers such as Fe, Cr, V, and Nb on the microstructures and phase constituents of Ti52Al48-xM (x=0, 1.0, 2.0, 4.0, or 6.0 at. pct and M=Fe, Cr, V, and Nb) alloys were studied. The dependence of the tensile properties and creep resistance of TiAl on the alloying elements, especially the formation of B2 phase, was investigated ...
Seung-Eon Kim, Yong-Tailee, Ming-Gao Yan, Chun-Xiao Cao, Fu-Sheng Sun   +4 more
openaire   +2 more sources

Influence of alloy compositions on the halogen effect in TiAl alloys

Materials and Corrosion, 2008
AbstractF‐implantation concentration profile simulations were carried out and the influence of the ion fluence, implantation energy as well as the alloy composition were investigated. For alloys with Al contents between 40 and 50 at% the conditions to get the halogen effect were assessed by thermodynamic calculations.
S. Neve, Patrick J. Masset, Michael Schütze, H.-E. Zschau   +3 more
openaire   +2 more sources

Characterization of microplasticity in TiAl-based alloys

Acta Materialia, 2009
Abstract Three different characteristic microstructures of Ti–44Al–8Nb–1B (at.%) have been studied by in situ loading, with acoustic emission and image correlation and ex situ by electron backscatter diffraction and transmission electron microscopy. Microyielding and pre-yield cracking occur at different applied stress levels; nearly fully lamellar ...
Jiang, H., Garcia-Pastor, F. A., Hu, D., Wu, X., Loretto, M. H., Preuss, M., Withers, P. J., D, Hu, X, Wu   +8 more
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Microalloying Effects in TiAl+Mo Alloys

Materials Science and Engineering: A, 1997
Abstract Ti–48.5Al–1.5Mo (at.%) and Ti–48.5Al–1.5Mo–X (X=0.3, 1.0 and 2.0C or N) alloys were prepared by vacuum arc melting and homogenized at 1390°C for the lamellar microstructure and then aged at 900°C. It was found that C (or N) additions decreased the grain size of the lamellar structure. In particular, 1.0 and 2.0%C (or N) additions refined the
Yun, JH, Oh, MH, Nam, SW, Wee, DM Wee, Dang-Moon, Inui, H, Yamaguchi, M   +5 more
openaire   +3 more sources

Surface tension of γ-TiAl-based alloys

Journal of Materials Science, 2009
Within the Integrated Project IMPRESS, funded by the EU, a concerted action was taken to determine the thermophysical properties of a c-TiAl-based alloys, suitable for casting of large turbine blades for aeroengines and stationary gas turbines. The challenge was to develop a castable alloy, free of grain refiners and susceptible to heat treatment ...
R Nowak, T Lanata, N Sobczak, E Ricci, D Giuranno, R Novakovic, D HollandMoritz, I Egry   +7 more
openaire   +2 more sources

Strength and ductility in TiAl alloys

Intermetallics, 1998
Abstract Tensile behavior of two-phase TiAl alloys at room temperature (RT) is analyzed for duplex and lamellar microstructural forms. The Hall-Petch relationship with high constants in fully-lamellar material is explained as a combined function of grain-size and deformation-anisotropy.
openaire   +2 more sources