Modeling residual stresses generated in Ti coatings thermally sprayed on Al2O3 substrates

Bulletin of the Polish Academy of Sciences. Technical Sciences

W. W?osi?skiInstitute of Fluid-Flow Machinery, Polish Academy of Sciences, 1 Defilad Sq., 00-901 Warszawa, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  D. Gola?skiCorresponding authorInstitute of Manufacturing Processes, Department of Welding Engineering, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar²  T. ChmielewskiInstitute of Manufacturing Processes, Department of Welding Engineering, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar²  J. ZimmermanInstitute of Mechanics and Printing, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar³  Z. LindemannInstitute of Mechanics and Printing, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar³ 

[1] Institute of Fluid-Flow Machinery, Polish Academy of Sciences, 1 Defilad Sq., 00-901 Warszawa, Poland;Institute of Manufacturing Processes, Department of Welding Engineering, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, Poland;Institute of Mechanics and Printing, Warsaw University of Technology, 85 Narbutta St., 02-524 Warsaw, Poland

关键词: Keywords : residual stress;    coatings;    thermal spray;   

DOI  :  10.2478/bpasts-2013-0051

学科分类：工程和技术（综合）

来源: Polska Akademia Nauk * Centrum Upowszechniania Nauki / Polish Academy of Sciences, Center for the Advancement of Science

【 摘 要 】

There is described a method of modeling by the finite element method the residual stresses induced during thermal deposition of coatings. The simulation was performed in two stages. The first dynamic stage simulated the impacts of the individual particles of the coating material onto the substrate, and the next static stage included a non-linear thermo-mechanical analysis intended for simulating the process of layer-by-layer deposition of the coating, with a specified thickness, and then cooling the entire system to the ambient temperature. In the computations, the samples were assumed to be cylindrical in shape and composed of an Al2O3 substrate and a titanium coating (with three different thicknesses) deposited using the detonation method. The correctness of the numerical model was verified experimentally by measuring the deflections of a real Ti coating/Al2O3 substrate sample with the Ti coating detonation-sprayed on the ceramic substrate, after cooling it to the ambient temperature. The experimental results appeared to be in good agreement with those obtained by the numerical computations.

【 授权许可】

Unknown