J. Phys. IV France 120 (2004) 381-388
Computer predictions of thermo-mechanical behavior and residual stresses in spray coating processD.-Y. Ju1, V. Ji2 and H. Gassot3
1 Department of Materials Science and Engineering, Saitama Institute of Technology, Fusaiji 1690, Okabe, Saitama 369-02, Japan
2 LM3, ENSAM, 15 boulevard de l'Hôpital, 75013 Paris, France
3 Institut de Physique Nucléaire d'Orsay, 91406 Orsay, France
This paper presents a numerical method in order to forecast the thermo-mechanical behavior and the residual stresses in the thermal spray coating process by using high velocity oxygen fuel (HVOF). A set of coupled equations of the heat conduction and stress/strain and solidification based on the metallo-thermo-mechanical theory is introduced into the simulation of thermal spraying. Here, an inelastic constitutive equation with capacity to represent relation of stress/strain during rapid solidification is employed. The numerical modelling based on the finite element method is proposed to solve the heat conduction associated with solidification in the sprayed layer and residual stresses on the interface between multi-layer materials, especially. In this paper, the simulated results of the temperature field, solidified domain and residual stresses in the sprayed layer including interfacial combinations between substrate and spray layer are presented, and the validity of the calculated results is discussed in comparison with the measured results obtained by X-ray diffraction.
© EDP Sciences 2004