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This study is aimed at supporting the efforts for developing life prediction methodologies of coated superalloys under thermo-mechanical fatigue (TMF). This paper reports on the microstructural changes and the crack propagation observed in CoNiCrAlY coated SRR99 superalloy under different thermo-mechanical fatigue test conditions. The complex microstructure of the interface region is described and the main mechanisms for residual stress relieve are identified and discussed.

Additional information

Authors: SEQUEIRA A D, Departamento de Física do ITN, Sacavém (PT);BRESSERS J, JRC Petten (NL)
Bibliographic Reference: Paper presented: Euromat 98, Lisboa (PT), July 21-24, 1998
Availability: Available from (1) as Paper EN 41767 ORA
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