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

• Published in: Strength of materials Vol. 40; no. 5; pp. 552 - 559
• Main Authors: Kravchuk, L. V., Kuriat, R. I., Buiskikh, K. P., Kiselevskaya, S. G.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.09.2008; Springer
• Subjects: 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; gas flow; thermal cyclic loading; degraded layer; phase, structural, and element analyses; directionally crystallized superalloys; Thermal stress; phase; and element analyses; Turbojet; Thermomechanical properties; Thermal fatigue; High temperature; Thermal load; Fatigue fracture; Superalloy; Gas flow; structural; Cyclic load; Damaging
• ISSN: 0039-2316; 1573-9325
• DOI: 10.1007/s11223-008-9068-1

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.