This article describes the control of the weld with illegal changes in the integrity of the design of motor vehicles, eddy current method of non-destructive testing. Description of the method and mathematical model. Experimental data are illustrated in tables and graphs. As well as the rationale for the effectiveness of this method.

Keywords: non-destructive inspection method, a weld, a motor vehicle, the frequency, the defect, the integrity of the design

This article discusses the process of developing an ultrasonic method of measuring the state of the electrolyte in the process of burning discharge with an electric electrode. The classical methods of electrical effects on the surface of steels, such as electrochemical, electro-erosion, electro-thermal and electro-mechanical have their drawbacks. Namely, high energy consumption, environmental pollution, the problem of recycling by-products, the difficulty of obtaining the required surface profile to a certain extent. In this regard, there is an acute issue of the development and research of new energy-saving, environmentally friendly and cost-effective methods of impact on the surface. At the moment there are no systematic experimental studies of discharge in multiphase media. Not the conditions for the ignition of the discharge with an electrolytic cathode. Not studied physical processes on the boundary of the plasma and the liquid. There is no mechanism of the effect of discharge in the vapor-gas bubble on the surface of metals. All the above reasons delay the development of technology of plasma-electrolyte formation of the surface microrelief. The aim of the work is to measure and optimize the ultrasonic signal and calculate the frequency spectrum of reflected ultrasonic vibrations from a large number of reflectors (electrolyte bubbles), as well as the development of mathematical modeling of the process of reflection of ultrasound from the electrolyte bubbles.

Keywords: Ultrasound; technique; electrolyte; combustion; measurement

This article describes the combined method of plasma-electrolyte processing and subsequent ultrasound imaging of medical needles created from steel grade 12H18N9T. A functional diagram of an installation for medical needles plasma-electrolyte treatment is presented. A device for ultrasound diagnostics of microrelief in the obtained material is described. The actual task of ultrasound medical research is the quality of the processed tip. One of the ways to obtain deformation at the end of the needle is the electrolyte-plasma discharge method at the anode of a given material. In the course of the study, previously obtained results were confirmed, indicating that the plasma electrolyte process was caused by a fivefold or more excess of the cathode area relative to the anode area Sк≥5Sа. A study was conducted of plasma-electrolytic processing of steel grade 12H18N9T using anodic electrolyte. It is shown that in the plasma formation area occurrence around the anode, the current-voltage characteristic is practically independent of the electrolyte concentration. The patterns of formation of the depth of the hole at the end of the needle, determined by the process of melting the surface layer of the anode, which requires a uniform input of heat over a unit of time. The depth of the well and the wavelength of ultrasound are shown. It is necessary to apply roughness (holes) with a size of 10-1000 microns at different angles relative to the axis of the tube with a tip. On the research basis, a unique device «KLYON-1» was created, which performs the material processing and its control by means of ultrasonic radiation.

Keywords: ultrasound, plasma, electrolyte, visualization, microrelief, needle, well