Fatigue Behavior of Bodies with Thermally Sprayed Metallic and Ceramic Deposits |
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| Authors: | Ondřej Kovářík Jan Siegl Zdeněk Procházka |
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| Affiliation: | (1) Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic;(2) Office of Research, Nanyang Technological University, 50 Nanyang Avenue, Blk N4, B4b-09, Singapore, Singapore, 639798 |
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| Abstract: | This paper summarizes the basic results of fatigue testing of bodies with both metallic and ceramic thermally sprayed coatings.
Three kinds of ceramic coatings (Al2O3, Cr2O3, and olivine) sprayed with DC plasma under identical conditions were investigated together with metallic Ni-5wt.%Al coatings
sprayed by wire arc, DC plasma, and HVOF. The elastic modulus of the deposited coatings was investigated using four point
bending and resonance method. Bending fatigue tests at resonance frequency were performed with cantilever beam specimens.
The processes taking place during the fatigue test are identified and discussed. The morphology of the fracture surfaces was
investigated together with microstructure and porosity of the coatings. |
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| Keywords: | elastic modulus fatigue fractography residual stress thermally sprayed coatings |
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