Thermo-mechanical finite element modeling of the laser treatment of cold sprayed coatings

Cold sprayed titanium coatings are finding a widespread increasing use in high performance applications, aiming to improve the performances of the coatings several post deposition treatments have been developed. Among these the laser treating allows to noticeably increase the superficial properties of titanium coatings when the process parameters are properly set. The aim of this paper is to propose a thermo-mechanical model able to simulate the laser treating of a cold sprayed titanium coating in order to find out the best process parameters. The model proposed takes into account both the thermal effects and the echanical stresses induced by the laser treatments, moreover the residual stresses induced within the coating have been predicted. The models allow to redict and highlight some effects observed by the authors in previous experimental papers. Moreover the temperature profiles, the maximum residual stresses and the residual stresses at the interface between the coating and the substrate have been predicted.