Degradation of the surface layers of superalloys and thermal-fatigue damage to the structural elements of gas-turbine engines

We study the phase composition, the structure of the surface degraded layer, and the concentrations of elements of a directionally crystallized superalloy tested in a high-temperature gas flow. The dependences of the degree of damage to the surface layer on the level of thermal stresses are establis...

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Veröffentlicht in:	Strength of materials 2008-09, Vol.40 (5), p.552-559
Hauptverfasser:	Kravchuk, L. V., Kuriat, R. I., Buiskikh, K. P., Kiselevskaya, S. G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Characterization and Evaluation of Materials Chemistry and Materials Science Classical Mechanics Exact sciences and technology Fracture mechanics (crack, fatigue, damage...) Fundamental areas of phenomenology (including applications) Materials Science Physics Solid Mechanics Static elasticity (thermoelasticity...) Structural and continuum mechanics
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Beschreibung
Zusammenfassung:	We study the phase composition, the structure of the surface degraded layer, and the concentrations of elements of a directionally crystallized superalloy tested in a high-temperature gas flow. The dependences of the degree of damage to the surface layer on the level of thermal stresses are established.
ISSN:	0039-2316 1573-9325
DOI:	10.1007/s11223-008-9068-1