Journal ArticleDOI
Positive temperature dependence of the yield stress in TiAl L10 type superlattice intermetallic compound single crystals at 293–1273 K
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In this paper, a floating zone method was used to obtain the fundamental knowledge on the plasticity of TiAl single crystals with five orientations and the yield stresses of all orientations tested show a positive temperature dependence similarly to most Ll2 type superlattice intermetallic compounds.About:
This article is published in Acta Metallurgica.The article was published on 1985-07-01. It has received 335 citations till now. The article focuses on the topics: Crystal twinning & Yield (engineering).read more
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Microstructure and deformation of two-phase γ-titanium aluminides
TL;DR: In this paper, the current knowledge on dislocation types and slip systems, the development of deformation substructures, factors controlling the mobility and multiplication of dislocations, interface related plasticity, solid solution and precipitate strengthening mechanisms as well as microscopic aspects of creep and fracture are addressed.
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The deformation behaviour of intermetallic superlattice compounds
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Viscosity of the supercooled liquid and relaxation at the glass transition of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass forming alloy
TL;DR: In this paper, the flow and relaxation of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass forming alloy was investigated in the supercooled liquid state and the glass transition region using parallel plate rheometry, three-point beam bending as well as differential scanning calorimetry.
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Synthesis, properties and applications of titanium aluminides
TL;DR: In this paper, the basic phase diagram and crystal structure of both the Ti3Al and TiAl phases are reviewed, followed by a consideration of chemistry-processing-microstructure-deformation/fracture-mechanical property relationships in monolithic material.
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Weak-beam observation of a dissociation transition in TiAl
TL;DR: In this paper, the nature and dissociation of screw superdislocations are compared after deformation at 20 and 600°C, and the abundant evidence for cross-slip onto octahedral planes at room temperature only supports the idea that the high-temperature configuration of the screw superdlocations controls the flow-stress peak in TiAl.
References
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Journal ArticleDOI
Temperature and orientation dependence of the yield stress in Ni{in3}Ga single crystals
S Takeuchi,E Kuramoto +1 more
TL;DR: In this article, the anomalous temperature dependence of the strength in Ni3Ga with Ll2 structure was investigated by deformation in compression at temperatures between 77 °K and 1000 °K.
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The deformation and fracture of TiAl at elevated temperatures
TL;DR: In this paper, the tensile properties of the intermetallic compound TiAl have been determined at several temperatures in the range 25 to 1000°C, and the results indicate that the ductilebrittle transition behavior of TiAl at about 700°C is controlled by the trailinga/6 [112] partial dislocation components of the superdislocations overcoming their pinning barriers.
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The plastic deformation of TiAl
TL;DR: In this paper, the deformation substructure of TiAl (Llo type ordered lattice) was tested in compression, and the factors determining it were investigated, and equi-Schmid factor lines have been constructed in an attempt to evaluate the importance of the sense of the applied stress on the deformability of the alloy.
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Dislocation configurations in AuCu3 and AuCu type superlattices
TL;DR: In this paper, a theoretical calculation of the expected spacing of superlattice dislocations was made, which involves the stacking fault energy, antiphase domain boundary energy and the elastic interaction energies between the individual dislocations.
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Fatigue deformation of TiAl base alloys
S. M. L. Sastry,H. A. Lipsitt +1 more
TL;DR: In this paper, the fracture behavior of Ti-36.3 wt pct Al and Ti-4.65 wt Pct Nb alloys was studied in the temperature range room temperature to 900°C.