Influence of chosen microstructure features on residual stress distribution in FGM surface coating system with the use of FEM micromechanical random models

• Autorzy: Szymczyk W. , Włodarczyk J.
• Języki publikacji: EN

Abstrakty

EN

Multilayered coatings established on parts of internal combustion as well as jet engines may be used as TBC systems providing their better thermal-mechanical efficiency, tribological properties, wear resistance and ability to withstand the influence of aggressive media. The example coating system was established on a beryllium copper substrate and consisted of the NiCr midsurface and TiN external layers. The system was analyzed as a functionally gradient material (FGM) with an assumed linear gradient function of material properties in transition zones between volumes of the pure materials of the substrate, midsurface and the external coating. The influence of the chosen microstructure features onto distribution of residual stresses was investigated. . These features were: transition zones, porosity and roughness of the external surface of the coating. Transition zones are the areas at the borders between particular layers of different materials where they are mutually interpenetrated. Different types of porosity were taken into comparisons: evenly dispersed and forming clusters. The 5, 10, 15 and 20% porosities of both of the types were investigated. At last roughness of the coating surface was introduced into the models. All the features were automatically generated with the use of random procedures.

Słowa kluczowe

EN

surface coatings; FEM; micromechanical modelling; functionally graded materials; roughness

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 2
• Strony: 485--492
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Szymczyk W.

autor

Włodarczyk J.

• Military University of Technology Faculty of Mechanical Engineering Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland,

Bibliografia

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