The Study of Characteristics of Elasticity and Residual Stresses in Coatings Applied by Plasma Methods

Abstract

At present, a strategically important task of technological independence of Russian industries is restoration of worn-out parts of machines and equipment by plasma methods based on the use of coatings of different functional purpose. The purpose of this study is to solve the actual problem of choosing the rational modes of plasma coating in the process of restoration of worn parts, subjected to intensive wear in the operation process. To solve this problem, the experimental studies of the elasticity characteristics in the plasma-deposited coatings were carried out. The study results allowed determining the most optimal range of rational modes of plasma coating deposition in terms of obtaining high elastic properties of plasma coatings as the key stage of resource-saving technology for restoration of worn parts of machinery and equipment.

Research on the Effect of Load and Rotation Speed on Resistance to Combined Wear of Stainless Steels Using ANOVA Analysis

“…mechanisms are complex, and the measured mass loss is greater than the sum of the mass losses of the individual action of corrosion and erosion [17,18].…”

“…Degradation of austenitic stainless steels in erosion-corrosion conditions is mainly determined by the mechanical action of impact particles, and in the case of martensitic stainless steels, it is accompanied by chemical action. In cases of simultaneous action of erosion and corrosion, the wear mechanisms are complex, and the measured mass loss is greater than the sum of the mass losses of the individual action of corrosion and erosion [ 17 , 18 ].…”

“…Degradation of austenitic stainless steels in erosion-corrosion conditions is mainly determined by the mechanical action of impact particles, and in the case of martensitic stainless steels, it is accompanied by chemical action. In cases of simultaneous action of erosion and corrosion, the wear mechanisms are complex, and the measured mass loss is greater than the sum of the mass losses of the individual action of corrosion and erosion [17,18]. This paper presents an experimental investigation of the influence of load and rotation speed, as well as the aggressive effect of media on the resistance of modified surfaces of stainless steels in combined wear conditions.…”

Evaluation of Agricultural Machinery Using Multi-Criteria Analysis Methods

“…When subjectively determining the weight of the criteria, the opinion of decision-makers (DM) is used for the importance of a certain criterion [16]. In the objective determination of the importance of criteria [17], the values of the alternatives are taken and based on these values, and the weights of the criteria are calculated using certain methods [18]. In these methods, there is no effect of DM on the value of the criterion weight [19].…”

Reliability Analysis of Rolling Ball Bearings Considering the Bearing Radial Clearance and Operating Temperature

“…Monitoring the exploitation characteristics of the aforementioned mechanical system is reduced to the visual assessment of the (bearing) system behavior complete with the measurement of vibration responses, clearances and system temperatures during the exploitation by applying designed dynamic process parameters and likewise [13][14][15][16]. Numerous research are focused on the analysis of the tribological properties of ball bearings [17][18][19]. The leading causes of the development of these tribological properties most commonly result from the geometrical, kinematic and dynamic occurrences [20].…”