Comparative study of a few fem models of a surface coating system

• Autorzy: Szymczyk W.
• 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 an ability to withstand the influence of aggressive media. A comparative review of a few different FEM models of a surface coating system is presented which can be used for the needs of designing improved parts of engines. The 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 graded as well as functionally gradient material (FGM) with an assumed gradient function of material properties. The more advanced models use a micromechanical technique of modeling which enables consideration of microstructure influence on the residual stress distribution. They contain transition zones between the pure material volumes where the material properties change accordingly to the linear gradient function. Simulations of microstructural effects in the area of surface coating are strongly recommended. The results of micromechanical calculations are affected locally too strong to be excluded from considerations.

Słowa kluczowe

EN

engine parts; surface coatings; FEM; micromechanical modelling; functionally graded materials

• 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: 2006
• Tom: Vol. 13, No. 4
• Strony: 41--49
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Szymczyk W.

• Military University of Technology, Faculty of General Mechanics Kaliskiego Str. 2, 00-908 Warsaw, Poland,

Bibliografia

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• [7] Grujicic, M. & Zhao, H., Optimization of 316 stainless steel/alumina functionally graded material for reduction of damage induced by thermal residual stresses, Mat. Sci. Eng., A252, 117-132, 1998.
• [8] Reiter, T. et al., Micromechanical models for graded composite materials, J. Mech. Phys. Solids, 45(8), 1281-1302, 1997.
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