Experimental Investigation of Displacement/Strain Fields in Metal Coatings Deposited on Ceramic Substrates by Thermal Spraying

Dariusz Golański; Grzegorz Dymny; Małgorzata Kujawińska; Tomasz Chmielewski

doi:10.4028/www.scientific.net/SSP.240.174

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Effect of a Notch on Impact Resistance of the Epidian 57/Z1 Epoxy Material after "Thermal Shock"
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Influence of the Method of Polymerization of Composite Material for Teeth Crown Fillings on its Strength Properties
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Experimental Investigation of Displacement/Strain Fields in Metal Coatings Deposited on Ceramic Substrates by Thermal Spraying
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Experimental Investigation of GFRP Laminate Thin-Walled Column Subjected to Uniform Compression
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Experimental Investigation of Displacement/Strain Fields in Metal Coatings Deposited on Ceramic Substrates by Thermal Spraying

Abstract:

The paper presents the initial results of application of the high sensitivity grating interferometry (GI) method in order to measure the displacement and strain fields in copper and titanium coatings thermally sprayed onto alumina ceramic (Al₂O₃). The residual stresses had been relieved by iterative cutting method, which was applied twice. The displacement maps of u and v were measured after each cut and ε_xx and ε_yy maps were calculated. The results clearly show the presence of ε_xx strains relieved along the second cut. The comparison of both samples confirmed that residual strains in Ti/Al₂O₃ are more significant than in Cu/Al₂O₃ system. The result after relevant postprocessing had been supplemented with the sub-surface principal residual stresses measured in the selected point by the x-ray diffraction method and curvature measurements.