Assessment of the Degraded High-Pressure Blades in a Land-Based Gas Turbine

被引：0
|
作者：
Khier Sabri
Mohamed Ouali Si-Chaib
Mohamed Gaceb
机构：
[1] Université M’Hamed Bougara de Boumerdès,Laboratory of Petroleum Equipment’s Reliability and Materials, Hydrocarbons and Chemistry Faculty
[2] UMBB,undefined
来源：
Journal of Failure Analysis and Prevention | 2021年 / 21卷
关键词：
(CC) GTD-111 superalloy; (CC) IN738LC superalloy; NiPtAl coating; VPS coating; Needle ; -phase; Hot corrosion/oxidation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
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页码：689 / 704
页数：15
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