Evaluation of Internal Stresses in Modified Near-Surface Layer of 20Kh13 Steel during Incubation Period of Water Droplet Impact Erosion

Alexey Mednikov, Olga Zilova, Aleksandr Tkhabisimov (), Gennady Kachalin, Artem Ryzhenkov and Sergey Grigoriev
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Alexey Mednikov: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia
Olga Zilova: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia
Aleksandr Tkhabisimov: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia
Gennady Kachalin: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia
Artem Ryzhenkov: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia
Sergey Grigoriev: Scientific Research Centre “Wear Resistance”, National Research University “Moscow Power Engineering Institute”, 14, Krasnokazarmennaya, 111250 Moscow, Russia

Energies, 2022, vol. 15, issue 23, 1-12

Abstract: This study investigates the change in internal stresses of ion nitrided and Cr–CrC ion-plasma-coated 20Kh13 steel samples during the incubation period of the droplet impact erosion. To obtain internal stress values, a method based on measuring the deformation (curvature) of the sample along the surface profiles before and after its modification/coating, as well as during the subsequent droplet impact has been applied. The results suggest that the initial droplet impact on the uncoated, nitrided and coated material leads to a sharp increase in the initial internal stress values. The rate of increase in internal stress decreases with the surface damage development and accumulation. The proposed method of stress evaluation can be used in selecting a criterion for comparing the erosion resistance of a material and a method for modifying its surface.

Keywords: droplet impact erosion; protective coatings; internal stresses; sample deformation measurement; ion plasma coatings; ion nitriding; reduced curvature; surface profile (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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