|
3805 |
|
Thursday, May 22, 2014, Hall A 9:20 AM Cold Gas Spraying 2 |
|
A morphological approach to the modeling of the cold spray process |
|
Francesco Delloro* / Centre des matériaux,
Ecole des Mines de Paris, France Matthieu Faessel / MINES ParisTech, Centre de morphologie mathématique, France Henri Proudhon/ MINES ParisTech, Centre des matériaux, France Dominique Jeulin/ MINES ParisTech, Centre de morphologie mathématique, France Michel Jeandin/ MINES ParisTech, Centre des matériaux, France Erick Meillot/ CEA-DAM, Le RIPAULT, France Thierry Laguionie/ CEA-DAM, Le RIPAULT, France Luc Bianchi/ CEA-DAM, Le RIPAULT, France |
|
Cold-sprayed layers exhibit a particular microstructure, which is the result of the coating build-up. In the present work, an advanced model of the cold spray process was developed to reproduce the real microstructure by simulating the deformation of the impinging particles and coating build-up. The model employs a collection of 3D binary images of the particles, which is achieved from segmentation of XMT (X-Ray Micro-Tomography) images. First, a particle is selected in the collection and a velocity is statistically assigned to it, as a function of its size. This is based on the size-velocity distribution which is experimentally measured. Then, the deformation, produced by the impact of the particle which impinges on the substrate or on the already deposited particles, is simulated. The evolution of the microstructure during the coating build-up can thus be obtained. The impact deformation is calculated with the help of a simplified model utilizing the results of 3D finite elements simulations of the impact of a particle on the substrate. The authors are grateful to Institut CARNOT-MINES , and to CEA DAM for the financial support. |