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| Naji, M. |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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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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Poza, Pedro
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Publications (7/7 displayed)
- 2024Manufacturing and cold spraying of hybrid composites — A path for metallizing thermoset matrix compositescitations
- 2024Hardness and Young's modulus evolution of low-power plasma sprayed Inconel 625 coatings exposed to high temperatures
- 2023Local wear resistance of Inconel 625 coatings processed by different thermal techniquescitations
- 2023Local wear resistance of Inconel 625 coatings processed by different thermal techniques : A comparative studycitations
- 2020Improving the oscillating wear response of cold sprayed Ti-6Al-4V coatings through a heat treatmentcitations
- 2015Evaluation of powder properties on the performance of cold sprayed Ti6Al4V for aerospace repairs
- 2010Confinement-Induced One-Dimensional Ferroelectric Polymer Arrayscitations
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article
Improving the oscillating wear response of cold sprayed Ti-6Al-4V coatings through a heat treatment
Abstract
Cold spray (CS) coating technique is being studied as a potential solution for repairing aircraft Ti-6Al-4V components. This work is focused on the restoration of damaged components due to wear induced by vibrations. It is known that Ti-6Al-4V CS deposition shows difficulties to obtain non-porous coatings due to the high strength of this material, that is detrimental for wear resistance. In this sense, performing a post-heat treatment leads to lower porosity CS Ti-6Al-4V coatings and improves their mechanical properties, and thus, a better tribological behaviour is also expected. Therefore, the objective of this study was to determine the effect of a post-heat treatment on the wear resistance of Ti-6Al-4V coatings deposited by the CS technique. Ti-6Al-4V CS coatings were used, which have been sprayed with nitrogen as process gas at a temperature of 1100 °C and a pressure of 50 bar. The coatings were subjected to a solution heat treatment followed by a precipitation heat treatment. Oscillating and unidirectional sliding wear experiments were conducted on the coatings at room temperature and at 450 °C. A pin on disc configuration was used with a bearing steel counterbody. The results were compared to those obtained on the substrate (which represents the material to be repaired) and on the as-sprayed coating, which were derived from a previous work. The heat treated coating presented improved wear behaviour as compared to the substrate as well as to the as-sprayed coating, particularly during the high temperature tests. Wear at high temperature was dominated by material transference from the counterbody to the Ti-6Al-4V coating.