TiAl alloys
Impact of β-phase in TiAl alloys on mechanical properties after high temperature air exposure
... c ONERA, 29 Avenue de la Division Leclerc, 92322 Châtillon Cedex, France. * To whom correspondence should be addressed: monchoux@cemes.fr Abstract In this paper, the influence of high temperature air exposure on the ...
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Microstructure and mechanical properties of high niobium containing TiAl alloys elaborated by spark plasma sintering
... However, it is surprising that: i) the group of samples cannot be distinguished from each other by the sintering temperature, ii) no difference in the mechanical behaviour is found between two-phased and duplex ...
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Deformation modes and size effect in near-γ TiAl alloys
... and alloys, ...the alloys. This is particularly the case of TiAl alloys, which are mainly developed for high temperature applications in the aeronautic or automotive ...several TiAl ...
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Grain refinement of TiAl alloys by isomorphic self-inoculation
... maintained before the alloy was allowed to cool so the powders could reach thermal equilibrium and interact with the melt. The interaction time was chosen to be long enough for the particles to not have a cooling effect ...
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Effect of ageing on the properties of the W-containing IRIS-TiAl alloy
... lamellar TiAl alloys, lamellae precipitate in grains along the (0001) basal plane and exhibits six different variants differing by the stacking sequence along the normal of the {111} interface (as ...
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Theoretical study on hydrogen solubility and diffusivity in the γ-TiAl L10 structure
... diffusivity value found in the literature that matches the result obtained here is the one found by Chen [25] , see Fig. 10 , which corresponds to the slowest H diffusivity measured experimentally. In the present work, ...
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Theoretical study on hydrogen solubility and diffusivity in the γ-TiAl L10 structure
... diffusivity value found in the literature that matches the result obtained here is the one found by Chen [25] , see Fig. 10 , which corresponds to the slowest H diffusivity measured experimentally. In the present work, ...
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Spark plasma sintering of a commercial TiAl 48-2-2 powder: Densification and creep analysis
... After linear regression, creep parameters for a lamellar structure were determined as A 0 = 32.05 10 3 MPa s − 1 , Q = 384,591 J/mol −1 , and n = 3.38. Even though the presence of residual porosities (≪ 1%), these values ...
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Development of a TiAl Alloy by Spark Plasma Sintering
... containing TiAl alloys for SPS processing in order to increase the service temperature of such intermetallic alloys for aeroengine and automotive ...ABB alloys, have already been investigated ...
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Theoretical study of oxygen insertion and diffusivity in the γ-TiAl L1 0 system
... Intermetallic TiAl-based alloys are promising materials for aircraft engines due to their high specific properties as compared to Ni-based superalloys [ 1 – 3 ...Ti-Al alloys react with the ...
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On the high creep strength of the W containing IRIS-TiAl alloy at 850°C
... 2 tensile tests [6] and ordinary dislocations were observed to move by a very fast and sudden movement of bursts of numerous dislocations which are in their screw orientation at the end of this process [7]. This ...
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Développement d’une nouvelle génération d’inoculants pour les alliages TiAl
... of TiAl alloys can be described in most cases by either dislocation glide/climb or grain boundary sliding ...lamellar TiAl samples show signs of ductile failure, however when exposed to higher ...
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Deformation mechanisms of nanostructured thermoelectric alloys
... 1.1.2 From discovery to advanced engineering 1.1.2.1 Early development The basis of the thermoelectric effect was settled by the mid-19 th century. In this era of industrial development, the major focus of the scientific ...
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2018 — Machinability of stainless steel alloys
... three alloys undergo commercial cycles of homogenization: The 304L Austenitic was a typical commercial version of Austenitic steel, and high strength 304L contains higher levels of the base ...
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Theoretical study of oxygen insertion and diffusivity in the g-TiAl L10 system
... 5. Conclusion This manuscript presents a complete study of the insertion and diffusion of oxygen in TiAl- L1 0 system. Different stable sites were found, but one site, the 2h site, is significantly more stable ...
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Superelastic Behavior of Biomedical Metallic Alloys
... superelastic alloys, ...both alloys are austenitic: B2 phase for NiTi and b phase for ...both alloys were charac- terized by cyclic tensile tests to compare their mechanical ...Ti-based alloys ...
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Spin Hall effect in AuW alloys
... AuW alloys Piotr Laczkowski 1,2 *, Juan Carlos Rojas-Sánchez 1,2 , Yu Fu 2 , Williams Savero-Torres 2 , Nicolas Reyren 1 , Cyrile Deranlot 1 , Jean-Marie George 1 , Henri Jaffrès 1 , Lucien Notin 2 , Cyrile Beigné ...
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Exploration de la voie SPS pour la fabrication d'aubes de turbine pour l'aéronautique : Développement d'un alliage TiAl performant et densification de préformes
... d’aubes TiAl les étages 6 et 7 de son moteur ...d’aubes TiAl, lui aussi au niveau de la turbine basse ...le TiAl est un matériau difficile à usiner et l’ébauche obtenue par fonderie requiert un ...
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Microstructure and properties of welds between 5754 Al alloys and AZ31 Mg alloys using a Yb:YAG laser
... Fig 2 (a) and (b) shows the cross-sections of joint at different conditions. From Fig 2 (a) and (b), we can see that no obvious welding defect was found in the joint, indicating that sound weld of A5754 Al alloys ...
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Galvanic corrosion of aluminium–copper model alloys
... Fig. 13. Optical micrographs of the surface of (a and b) the Al–33Cu alloy and (c and d) the Al–42Cu alloy after galvanic coupling for 2 h in 0.1 M Na2SO4 solution. cial alloys [6] . In a first step, pits form on ...
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