Community Research and Development Information Service - CORDIS

Abstract

Overlay coatings such as CoNiCrAlY, are being increasingly used to protect structural superalloy components, both as buffer layers in thermal barrier coatings and as external protective layers, in high temperature applications, owing to their very good oxidation resistance and good ductility in particular at high temperature. However, the different thermal and mechanical properties of the two materials, coating and substrate, when subjected to changes of temperature and mechanical strain produce large residual stresses at their interface. The aim of this paper is to present and discuss residual stress measurements performed at the surface of CoNiCrAlY coated SRR-99 single crystal superalloys upon thermo-mechanical fatigue (TMF).

Additional information

Authors: REBELO S, Departamento de Física do Instituto Tecnológico e Nuclear, Sacavém (PT);SEQUEIRA A D, Departamento de Física do Instituto Tecnológico e Nuclear, Sacavém (PT);BRESSERS J, JRC Petten (NL)
Bibliographic Reference: Paper presented: Fisica 98, Oporto (PT), September 7-10, 1998
Availability: Available from (1) as Paper EN 41769 ORA
Record Number: 199811386 / Last updated on: 1998-11-10
Category: PUBLICATION
Original language: en
Available languages: en