J. Patru, Science des Procédés Céramiques et Traitements de Surface - University of Limoges, Limoges, France; P. FAUCHAIS, SPCTS Laboratory, University of Limoges, Limoges, France; L. Bianchi, CEA, Monts, France; F. Hugot, ENSIL, Limoges, France
This paper presents the results of a CAST3M numerical model which purpose
is to simulate the thermal and mechanical behavior of a metallic beam during the
preheating stage , YSZ or stainless steel plasma spraying and cooling. To achieve
such a model, the environment of the whole thermal and mechanical phenomena were
quantified in order to provide the model accurate boundary conditions,
corresponding to a specific geometry. The final aim of this study is to
compare the calculated residual stress profiles to experimentally
determined ones (by in situ curvature measurement and then hole drilling method).
The plasma torch stand-off distance, the relative torch/substrate velocity
and the substrate and coating materials were considered as parameters of
this study.
Summary: This study compares residual stresses numerical results to stress profiles determined by hole drilling and in situ curvature measurement methods. It required the determination of the whole device thermal and mechanical behavior in order to give the model correct boundary conditions (plasma flux, convection and friction phenomena).
