Page 96 - IJAMD-1-3

International Journal of AI for
Materials and Design
Review of gas turbine blade failures by erosion

of turbine blades. 52,53 These studies typically encompass enhanced erosion resistance, the application of advanced
a comprehensive examination of erosion mechanisms, coating systems, and the implementation of innovative
failure modes, and the specific environmental conditions cooling techniques to manage temperature differentials
contributing to erosion-induced damage. Discussions often and reduce thermal stresses that can exacerbate erosion
revolve around the development of advanced materials, damage.
including erosion-resistant super alloys, innovative coating Moreover, it is probable that the review provides a critical
technologies such as TBCs, and sophisticated cooling appraisal of the latest advancements in computational
strategies to manage the thermal stresses and protect the modeling techniques, exploring how these tools have
blades from erosion-related degradation. Furthermore, revolutionized the understanding of erosion dynamics within
discussions in such reviews often delve into the latest gas turbine environments. Such discussions would likely
advancements in computational modeling techniques, highlight the pivotal role of computational simulations, such
including finite element method and CFD, enabling a as FEA and CFD, in simulating complex erosion scenarios
deeper understanding of the complex dynamics associated and facilitating the design of robust mitigation strategies
with erosion processes within gas turbine environments. tailored to specific operating conditions and turbine
Examining the critical aspects of gas turbine blade configurations. This comprehensive review would serve as
failures caused by erosion represents a significant a valuable resource for researchers, engineers, and industry
contribution to the ongoing efforts in the field of gas professionals, offering in-depth insights and practical
turbine technology and erosion management. By guidance for addressing the persistent challenges associated
scrutinizing the critical aspects and intricate nuances of with erosion-induced gas turbine blade failures. The
erosion-induced gas turbine blade failures, this review integration of findings from this review into the development
delves into the multifaceted nature of erosive processes, of future research directions and practical applications could
addressing the underlying mechanisms, key contributing significantly contribute to the advancement of erosion
factors, and the implications of erosion on the overall management strategies, ensuring enhanced performance,
operational efficiency and longevity of gas turbines. In durability, and reliability of gas turbine systems in diverse
addition to the detailed analysis of erosion mechanisms, industrial applications. Table 14 outlines the comprehensive
this comprehensive review offers insights into the diverse and categorized core outcome results derived from the
strategies and technologies employed to mitigate erosion ongoing research, summarizing the failure mechanisms,
effects and enhance the resilience of gas turbine blades. erosion resistance of materials, influencing factors, analysis
These discussions might encompass a broad spectrum of techniques, mitigation strategies, and blade vulnerability
topics, including the development of novel materials with zones in gas turbine blade erosion.

Table 14. Overview of different types of gas turbine blade erosion

Category Key points Details References
55
Failure SPE High-velocity particles remove material, especially at leading and Hamed et al., Wang et al. 33
mechanisms trailing edges.
Fatigue Pits and cracks from erosion act as stress concentrators, accelerating Ahsan et al., Rajabinezhad et al. 76
49
structural degradation.
Oxidation and hot Exposed material reacts with oxidizing gases, causing chemical Rajabinezhad et al. 76
corrosion degradation.
Creep Erosion-thinned material deforms under high stress, reducing Rajabinezhad et al. 76
structural integrity.
Erosion resistance YSZ High resistance in high-temperature environments, suitable for Shin and Hamed 57
of materials TBCs.
Alumina-based Moderate resistance; effective against abrasion but limited at elevated Branco et al. 58
coatings temperatures.
MCrAlY bond coats Moderate resistance; supports ceramic topcoats and improves Shin and Hamed 77
adhesion.
Nickel-based Moderate to high resistance; good for high-stress environments but Rajabinezhad et al. 76
superalloys relies on coatings for erosion protection.
(Cont'd...)

Volume 1 Issue 3 (2024) 90 doi: 10.36922/ijamd.5188