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| Titre: | Assessment of the degraded high-pressure blades in a land-based gas turbine |
| Auteur(s): | Sabri, Khier
Si-Chaib, Mohamed Ouali
Gaceb, Mohamed |
| Mots-clés: | (CC) GTD-111 superalloy
(CC) IN738LC superalloy
NiPtAl coating
VPS coating
Needle r-phase
Hot corrosion/oxidation |
| Date de publication: | 2021 |
| Editeur: | Springer |
| Collection/Numéro: | Journal of Failure Analysis and Prevention/ (2021); pp. 1-16 |
| Résumé: | The purpose of this paper is to evaluate high-pressure turbine blades after a long-term thermal exposure in a land-based gas turbine. Emphasis is placed upon structure and composition of the various layers evolving, on the one hand, due to hot oxidation/corrosion attacks and, on the other hand, because of interdiffusion phenomena between the substrates and their protective coatings. This work therefore discusses the influence of γ′-Ni3 (Al, Ti) precipitates coarsening, needle σ-phase nucleation, and M23C6-Carbides formation on the hardness properties of blades. In addition, this assessment attempts to evaluate the influence of γ′-Ni3 (Al, Ti) orientation changes and crystallites size growth on the intrinsic degradation of GTD-111 and IN738LC substrates |
| URI/URL: | https://link.springer.com/article/10.1007/s11668-020-01076-5
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6305 |
| ISSN: | 1547-7029 |
| Collection(s) : | Publications Internationales
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