I Congreso de Postgrado fcfm: ingeniería, ciencias e innovación

160 Santiago, 10 al 12 de agosto, 2022 STUDY OF THE EFFECT OF THICKNESS ON THE RESIDUAL STRESS PROFILE OF A COLD SPRAY COATING BY FINITE ELEMENT ANALYSIS Felipe Torres¹*, Rubén Fernández¹ 1 Departamento de Ingeni ría Mecánica Facultad de Ciencias Físicas y Matemáticas de la Universidad de Chile, Beauchef 851, Santiago, Chile. *Email: felipe.torres.c@ug.uchile.cl ABSTRACT The understanding of residual stress is of critical importance in the cold spray and thermal spray processes. It has a direct effect on the integrity of the coating related to the adhesion strength, fatigue life, and can lead to undesired effects such as the delamination of the coating [1-9]. In cold spray, several investigations have evaluated the impact of the residual stress on the coatings, and it is generally accepted that cold spray coatings follow a similar profile to those obtained in the shot peening process [3,6,10-12]. Although the measurement of residual stresses gives fundamental insight into the process, the estimation of such stresses considering the deposition of each layer by numerical methods has not been extensively studied [3,10,11]. This work proposes a method for analyzing the evolution of residual stress on a cold spray coating, both on the coating and the substrate, as a function of the deposited layers, using Finite Element Analysis (FEA). The evolution of the residual stress profile with the coating thickness was obtained along the transverse direction. The results were compared to experimental and numerical data from previous studies [3,10,11]. The inf luence of the deposition of each layer on the residual stress profile has been discussed. ACKNOWLEDGMENTS This work was supported by CONICYT-PFCHA/Magíster Nacional/2020 – 22201405. REFERENCES [1] O. Smith, S. Autor y S. Klein, Phys. Rev. H 60 , 028793 (2009) [2] P. Autor y T. Autor, Phyz. Rev. Lett. 118 , 190603 (2017) [1] V.K. Champagne, Woodhead Publishing Limited (2007) [2] R.T.R. McGrann et al., Surf. Coatings Technol. 108–109 , 59–64 (1998) [3] V. Luzin et al., Acta Mater. 59 , 1259–1270 (2011) [4] J. Karthikeyan, Elsevier Ltd. 62–71 (2007) [5] J. Cizek et al., Surf. Coatings Technol. 217 , 23–33 (2013) [6] R. Ghelichi et al., Acta Mater. 60, 6555–6561 (2012) [7] C.Y. Jeong et al., Int. J. Cast Met. Res. 21 , 235–238 (2008) [8] T.S. Price et al., Proc. Int. Therm. Spray Conf. 15 , 507–512 (2006) [9] R. Ghelichi et al., Int. J. Fatigue. 65 , 51–57 (2014) [10] G. Shayegan et al., Mater. Des. 60 , 72–84 (2014) [11] R. Ghelichi et al., Appl. Surf. Sci. 288 , 26–33 (2014) [12] C.W. Ziemian et al., Mater. Des. 54 , 212–221 (2014) NANOT E CNO LOG Í A Y MAT E R I A L E S 14