Sabri, KhierGaceb, MohamedSi-Chaib, Mohamed Ouali2021-06-202021-06-202020https://doi.org/10.1007/s11668-020-00920-yhttps://link.springer.com/article/10.1007/s11668-020-00920-yhttps://dspace.univ-boumerdes.dz/handle/123456789/7028The purpose of this paper is to clarify the impact of pitting corrosion and erosion on the directionally solidified (DS) GTD-111 turbine blade behavior. Moreover, the pitting corrosion and oxidation phenomena engendered inside cooling channels of the turbine blade are utterly highlighted. Other features such as the η (Ni3, Ti) platelets nucleation, needle σ-phase precipitation at the interface NiPtAl/(DS) GTD-111 substrate are exhibited as well. Finally, the different microstructural changes in (NiPtAl) coating strata against hot corrosion, oxidation and interaction with (DS) GTD-111 substrate are revealed and argued.en(DS) GTD-111 superalloyErosionPitting corrosionNeedle r-phasec0- Ni3 (Al, Ti) precipitatesArticle