Effect of interface diffusion on low-cycle fatigue behaviors of MCrAlY coated single crystal superalloys
Source abstract
Abstract
Abstract To protect gas turbine blades from oxidation and erosion, they are commonly treated with MCrAlY coatings. However, the mechanical properties of the blades can be negatively affected by inter-diffusion with the coating. Therefore, in this study, the effect of inter-diffusion on the low-cycle fatigue (LCF) behavior of MCrAlY coated single-crystal superalloys pre-exposed to high temperatures for different durations was studied by conducting tests and observing them by scanning electron microscopy and energy-dispersive spectroscopy. The inter-diffusion of the coating and substrate-induced by pre-exposure caused the generation of topologically-close packed (TCP) phases. Furthermore, increasing the number of TCP phases reduced the LCF life of single-crystal superalloys. To evaluate the degradation of the LCF life, an empirical life prediction model was proposed, and the calculation results fitted well with test results.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · High-Temperature Coating Behaviors · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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