Acta Metallurgica Sinica (English Letters) ›› 1992, Vol. 5 ›› Issue (2): 121-127.

• Research paper • Previous Articles     Next Articles

EFFECT OF MICROSTRUCTURE OF ALUMINIDE COATING ON HIGH-CYCLE FATIGUE PERFORMANCE OF COATING-SUPERALLOY SYSTEM

FA N Ruilin Institute of Aeronautical Materials,Beijing,China   

  • Received:1992-04-25 Revised:1992-04-25 Online:1992-04-25 Published:2009-10-10

Abstract: The high-cycle fatigue performance of different microstructures of aluminide coating- superalloy system has been studied at 900℃.The single phase coating of coarse equiaxial grain NiAI(β)has unfavorable eJfect onJatigue life of the coating-superalloy.The fatigue life may shorten if the coating of NiAl(β)was an enrichment of coarse refractory metal grains. While an improvement can be made by dispersing numerous secondary phase particles such as extreme.fine γ′,quasi-σ-phase and others.

Key words: aluminide coating, coating microstructure, high temperature, high cycle fatigue