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The present paper discusses the impact of the speed of an abrasive water jet cutting process on some surface properties and morphology of the S235JRG1 steel. The values of the cutting speeds used for the analysis were of 100, 150 and 200 mm.min ⁻¹respectively . A contact profile method was used to analyze the surface roughness during the conducted...
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... illustrated in Fig. 1, the water jet cutting with an abrasive additive works on the principle of material removal by the mechanical action of a high velocity jet possessing a high kinetic energy per unit of area. The addition of the abrasive increases the mechanical effect on the removal of the material layer. If compared with other methods of material ...
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... Obtaining generalized mathematically similar dependencies describing processes and phenomena that are very heterogeneous in their physical essence is an urgent problem of modeling [1][2][3]. The solution of this problem allows, using universal apparatus, to create real prerequisites for determining quantitative ratios and disclosing the interconnectedness of the parameters of simulated scientific and experimental research objects. ...
... The information-physical basis of ultrajet mesodiagnostics (UJM) consists of the analysis of material's under study particles mass-geometric characteristics' dependence (eroded by a highspeed hydrojet) on the parameters of its functional quality [1]. Therefore, UJM occupies an intermediate position between the usual known methods of surface layer non-destructive quality control and the traditional methods of physical and mechanical destructive tests, which are widely used in the manufacture of complex products of machinery technology [2][3][4]. ...
Technologically, ultrajet mesodiagnostics (UJM) consists of local hydroerosive indentation by ultrajets (UJ) of water on the surface of the analyzed object (OA) and the subsequent study of the results of this minimally invasive microdestructive effect on its surface layer. Obviously, mathematical models’ construction of the functional relationship between the informative-physical signs of hydroerosive UJ destruction and the surface layer’s state parameters of various OA, primarily their defectiveness, is very important for the development of this potentially promising technology for ensuring the quality of critical products, mainly aviation and other industries. In this regard, the work proposes a probabilistic UJM model, which consists of analyzing the kinetics of the formation of an aggregate set of eroded particles, as a process caused by a combination of appropriate necessary and sufficient conditions for its implementation. The former include the topographic features of the microdefectiveness’ characteristics of the surface layer material, and the latter consist of a certain variational-force hydrodynamic effect of the diagnostic UJ on it. This approach made it possible to obtain calculated data related to probabilistic distribution of the UJ-eroded particles’ sizes of hypothetical OA, as a coordinate function describing the microdefects’ concentration in its surface layer. These functions are close to the available results of experimental UJM of typical and promising materials used in the manufacture of machinery technology.
... The formation of abrasive-liquid suspension was carried out using water-jet cutting machine Flow Mach 3 3131b (manufactured in the USA). Aluminum alloy was chosen as the diagnosed material [12]. A round sample was cut from the sheet, corresponding in size to standard cutting discs for angle grinders with an external diameter of 125 mm, an internal bore diameter of 22 mm and a thickness of 2 mm. ...
The article considers the development of a new method for the materials abrasion resistance diagnostics. The advantages of the proposed ultra water-jet abrasive diagnostics method and the disadvantages of existing ones are given. The implementation diagram of the method, the results of the experiments and the samples images with traces of abrasive jet interaction are presented. The phenomenological ideas of the nature of erosion of interacting materials are highlighted.
... 1 -angle grinder 2 -support assembly 3 -fixing screw Aluminum alloy was chosen as the diagnosed material [12]. A round sample was cut from a sheet, corresponding in size to standard cutting discs for angle grinders with external diameter of 125 mm, internal bore diameter of 22 mm, and thickness of 2 mm. ...
The article deals with the development of a new diagnostic method for materials abrasion resistance. It lists the advantages of the proposed ultra water-jet abrasive diagnostics method and the disadvantages of existing ones. The implementation diagram of the method, the results of the experiments and the samples images with traces of abrasive jet interaction are presented. The phenomenological ideas of the nature of erosion of interacting materials are highlighted.
