A model for determination of residual stresses in plasma coatings |
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| Authors: | I. N. Kravchenko A. V. Kolomeychenko I. E. Pupavtsev Yu. N. Baranov A. A. Puzryakov R. Yu. Solovev |
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| Affiliation: | 1. K.A. Timiryazev Russian State Agricultural University, Moscow, Russia;2. Orlovsk State Agricultural University, Orlovsk, Russia;3. Institute of Transport, Prioksky State University, Orel, Russia;4. N.E. Bauman Moscow State University, Moscow, Russia;5. All-Russian Research Institute of Technology, Repair and Maintenance of Machines and Tractors (GOSNITI), Krasnodar, Russia |
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| Abstract: | The main reasons for the formation of residual (internal tensile) stresses in thermal spraying methods are the large differences in the temperatures of particles of deposited material on the surface of the substrate, the specific volumes of these particles at the moment of contact with the substrate and in the cooled condition, and also the non-uniformity of the distribution of temperature over the cross-section of the coating. The theory of hereditary elasticity is used to develop a mathematical model of theoretical justification of the process of formation and redistribution of the residual stresses which takes into account the relationship between the stresses and strains in the contact – substrate zone in heating and also the changes of their strength properties. Analytical dependences of controlling the technological parameters, such as the time and heating temperature, are proposed. |
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| Keywords: | Gas thermal methods of coating depositions residual stresses Voltaire’s principle adhesive strength thermal distortion hereditary elasticity theory |
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