The problem of wear-resistant coatings quality
Engineering Education # 02, February 2014
The article aims at solving a problem concerning the express evaluation of the wear-resistant nanostructure coatings quality using the method of ultra-fluid jet examination. Conducted research activities have shown that an intensity of the coating delamination from the substrate depends on the stress concentration level in the test sample. The proposed informatively methodological procedure of ultra-fluid jet examination will allow prompt estimation of physical-and-mechanical parameters and operational condition of coatings being deposited on samples and passed fatigue loading. The offered procedure can be effectively used for selecting the coating material, substrate, and efficient modes of application.
Modernization of technology to estimate composite constructional ceramics operational dynamic properties using a hydroabrasive ultrastream
Engineering Education # 03, March 2014
The articles concerns the constructional ceramics (CC) diagnostics based on the aluminum oxide. Relevance of the article subject of is caused by the need to have in a technical arsenal of the technologist methods of express-diagnostics, which can be applied at the stage of technological preparation of CC production. Their absence, today, considerably complicates the fine-tuning technology and prohibits from obtaining the latest information about operational dynamic properties of this material. The article presents the comparison results of the micromorpholodgy analysis of KK chips after static and dynamic influence. It analyses the obtained results and draws conclusions on a possibility to use an ultrajet diagnostics method at the stage of production in addition to tests using the solid-state drummers. The article gives justification for efficiency of ultrajet diagnostics methods, considers the prospects of its practical application in manufacturing products from KK.
77-30569/224593 Application of hydroabrasive cutting for rescue of car accident injured
Engineering Education # 08, August 2011
Issues of people rescue from the crashed car body are researched in the article. It is described the method of hydroabrasive metal cutting. Mobile vehicle with hydroabrasive cutting tool based on a wheeled chassis was proposed to deal with the consequences of car accinents. The Idea application is reasonable for cars as well as for bullet-proof, military and railroad vehicles.
77-30569/223166 Mechanisms of hydroerosive destruction of a solid barrier
Engineering Education # 10, October 2011
In the article it is described a set of existing perceptions about mechanisms of hydroerosive destruction by means of high-speed waterjets. The estimation of how different factors influence on speed of erosion process is given. Results of FEM simulation of waterjet impact to a rigid surface are presented. It is highlighted a significant role of a wave processes occurring in a area of a jet impact on the hydroerosion.