693.932 PEOPLE
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eggeler, G.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (48/48 displayed)
- 2024Evolution of local misorientations in the γ/γ’‐microstructure of single crystal superalloys during creep studied with the rotation vector baseline (RVB) EBSD methodcitations
- 2022On the impact of nanometric γ’ precipitates on the tensile deformation of superelastic Co49Ni21Ga30citations
- 2022The role of electrons during the martensitic phase transformation in NiTi-based shape memory alloyscitations
- 2021Effect of off-stoichiometric compositions on microstructures and phase transformation behavior in Ni-Cu-Pd-Ti-Zr-Hf high entropy shape memory alloys
- 2021Thermoelastic properties and γ’-solvus temperatures of single-crystal Ni-base superalloyscitations
- 2021Dislocation networks in gamma/gamma’-microstructures formed during selective laser melting of a Ni-base superalloy
- 2021Impact of test temperature on functional degradation in Fe-Ni-Co-Al-Ta shape memory alloy single crystalscitations
- 2019Creep properties of single crystal Ni-base superalloys (SX): A comparison between conventionally cast and additive manufactured CMSX-4 materialscitations
- 2019Impact of Heating–Cooling Rates on the Functional Properties of Ti–20Ta–5Al High-Temperature Shape Memory Alloyscitations
- 2019Tension/Compression asymmetry of a creep deformed single crystal Co-base superalloycitations
- 2018On shear testing of single crystal Ni-base superalloyscitations
- 2018Microstructure and Mechanical Properties of CMSX-4 Single Crystals Prepared by Additive Manufacturingcitations
- 2018Martensite aging in 〈0 0 1〉 oriented Co<inf>49</inf>Ni<inf>21</inf>Ga<inf>30</inf> single crystals in tensioncitations
- 2018On the diffusive phase transformation mechanism assisted by extended dislocations during creep of a single crystal CoNi-based superalloycitations
- 2017Identification of a ternary mu-phase in the Co-Ti-W system - An advanced correlative thin-film and bulk combinatorial materials investigationcitations
- 2017Identification of a ternary μ-phase in the Co-Ti-W system – An advanced correlative thin-film and bulk combinatorial materials investigationcitations
- 2017Microstructural evolution and functional fatigue of a Ti-25Ta high-temperature shape memory alloycitations
- 2016Nanostructured Ti-Ta thin films synthesized by combinatorial glancing angle sputter depositioncitations
- 2016Double minimum creep of single crystal Ni-base superalloyscitations
- 2016Decomposition of the single-phase high-entropy alloy CrMnFeCoNi after prolonged anneals at intermediate temperaturescitations
- 2016Transmission electron microscopy of a CMSX-4 Ni-base superalloy produced by selective electron beam meltingcitations
- 2015The effect of cast microstructure and crystallography on rafting, dislocation plasticity and creep anisotropy of single crystal Ni-base superalloyscitations
- 2015Nanoindentation studies of the mechanical properties of the mu phase in a creep deformed Re containing nickel-based superalloycitations
- 2015Functional and structural fatigue of titanium tantalum high temperature shape memory alloys (HT SMAs)citations
- 2015Cyclic degradation of titanium-tantalum high-temperature shape memory alloyscitations
- 2015Functional Fatigue and Tension–Compression Asymmetry in [001]-Oriented Co<inf>49</inf>Ni<inf>21</inf>Ga<inf>30</inf> High-Temperature Shape Memory Alloy Single Crystalscitations
- 2015Advanced scale bridging microstructure analysis of single crystal Ni-base superalloyscitations
- 2015Advanced Scale Bridging Microstructure Analysis of Single Crystal Ni-Base Superalloys
- 2015Martensite agingcitations
- 2015The nucleation of Mo-rich Laves phase particles adjacent to M<inf>23</inf>C<inf>6</inf> micrograin boundary carbides in 12% Cr tempered martensite ferritic steelscitations
- 2014On the functional degradation of binary titanium-tantalum high-temperature shape memory alloyscitations
- 2014Cyclic degradation mechanisms in aged FeNiCoAlTa shape memory single crystalscitations
- 2014Micromechanical modeling of creep damage in a copper-antimony alloycitations
- 2013High-temperature and low-stress creep anisotropy of single-crystal superalloyscitations
- 2013Effect of climb on dislocation mechanisms and creep rates in gamma '-strengthened Ni base superalloy single crystals: A discrete dislocation dynamics studycitations
- 2012Advanced scanning transmission stereo electron microscopy of structural and functional engineering materialscitations
- 2012Pseudoelastic deformation and size effects during in situ transmission electron microscopy tensile testing of NiTicitations
- 2012Ductilization of Mo-Si solid solutions manufactured by powder metallurgy
- 2012Caloric effects in ferroic materials: New concepts for coolingcitations
- 2010Effects of annealing on the microstructure and the mechanical properties of EB-PVD thermal barrier coatingscitations
- 2010Influence of Ni on martensitic phase transformations in NiTicitations
- 2010Where Does the Lithium Go? – A Study of the Precipitates in the Stir Zone of a Friction Stir Weld in a Li-containing 2xxx Series Al Alloycitations
- 2010Analysis of local microstructure after shear creep deformationcitations
- 2009Metallic materials for structural applications beyond nickel-based superalloyscitations
- 2009R-phase formation in Ti(39)Ni(45)Cu(16) shape memory thin films and bulk alloys discovered by combinatorial methodscitations
- 2009Influence of precipitates on the thermal hysteresis of Ti-Ni-Pd shape memory thin filmscitations
- 2009Thermal barrier coating systems - analysis of nanoindentation curvescitations
- 2007Symposium on ultrafine-grained materials: From basics to applications
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article
Microstructural evolution and functional fatigue of a Ti-25Ta high-temperature shape memory alloy
Abstract
Titanium–tantalum based alloys can demonstrate a martensitic transformation well above 100 °C, which makes them attractive for shape memory applications at elevated temperatures. In addition, they provide for good workability and contain only reasonably priced constituents. The current study presents results from functional fatigue experiments on a binary Ti–25Ta high-temperature shape memory alloy. This material shows a martensitic transformation at about 350 °C along with a transformation strain of 2 pct at a bias stress of 100 MPa. The success of most of the envisaged applications will, however, hinge on the microstructural stability under thermomechanical loading. Thus, light and electron optical microscopy as well X-ray diffraction were used to uncover the mechanisms that dominate functional degradation in different temperature regimes. It is demonstrated the maximum test temperature is the key parameter that governs functional degradation in the thermomechanical fatigue tests. Specifically, ω-phase formation and local decomposition in Ti-rich and Ta-rich areas dominate when T max does not exceed ≈430 °C. As T max is increased, the detrimental phases start to dissolve and functional fatigue can be suppressed. However, when T max reaches ≈620 °C, structural fatigue sets in, and fatigue life is again deteriorated by oxygen-induced crack formation. Copyright © Materials Research Society 2017