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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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| Ospanova, Alyiya |
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| Blanpain, Bart |
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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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Rodrigues, Patricia Freitas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Investigation of the Effect of Milling Time on Elemental Powders of Oxi-Reduction Nickel and Hydrogenation : Dehydrogenation Titanium
- 2022The Study of New NiTi Actuators to Reinforce the Wing Movement of Aircraft Systemscitations
- 2022Microwave versus Conventional Sintering of NiTi Alloys Processed by Mechanical Alloyingcitations
- 2021Controlling the phase transformation window during stages of hot/cold forging of Ni-rich Ni–Ti alloycitations
- 2021The influence of the soaking temperature rotary forging and solution heat treatment on the structural and mechanical behavior in ni-rich niti alloycitations
- 2021Experimental analysis of niti alloy during strain-controlled low-cycle fatiguecitations
- 2019In Situ Structural Characterization of Functionally Graded Ni–Ti Shape Memory Alloy During Tensile Loadingcitations
- 2019Physical and morphological characterization of chitosan/montmorillonite films incorporated with ginger essential oilcitations
- 2019Physical and morphological characterization of chitosan/montmorillonite films incorporated with ginger essential oilcitations
- 2018In situ Structural Characterization of Functionally Graded Ni-Ti Shape Memory Alloy During Tensile Loading
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article
The influence of the soaking temperature rotary forging and solution heat treatment on the structural and mechanical behavior in ni-rich niti alloy
Abstract
<p>The structural and thermophysical characteristics of an Ni-rich NiTi alloy rod produced on a laboratory scale was studied. The soak temperature of the solution heat-treatment steps above 850<sup>◦</sup> C taking advantage of the precipitate dissolution to provide a matrix homogenization, but it takes many hours (24 to 48) when used without thermomechanical steps. Therefore, the suitable reheating to apply between the forging process steps is very important, because the product’s structural characteristics are dependent on the thermomechanical processing history, and the time required to expose the material to high temperatures during the processing is reduced. The structural characteristics were investigated after solution heat treatment at 900<sup>◦</sup> C and 950<sup>◦</sup> C for 120 min, and these heat treatments were compared with as-forged sample structural characteristics (one hot deformation step after 800<sup>◦</sup> C for a 30 min reheat stage). The phase-transformation temperatures were analyzed through differential scanning calorimetry (DSC), and the structural characterization was performed through synchrotron radiation-based X-ray diffraction (SR-XRD) at room temperature. It was observed that the solution heat treatment at 950<sup>◦</sup> C/120 min presents a lower martensitic reversion finish temperature (A<sub>f</sub> ); the matrix was fully austenitic; and it had a hardness of about 226 HV. Thus, this condition is the most suitable for the reheating stages between the hot forging-process steps to be applied to this alloy to produce materials that can display a superelasticity effect, for applications such as crack sensors or orthodontic archwires.</p>