Use of Modern Materials in Technological Processes Accompanied by Frictional Heating

Dear Colleagues,

The phenomenon of friction is widely used in grinding, welding, cutting, and other technological processes. Thermal phenomena accompanying friction have a decisive influence both on the course of these processes and on the quality of the final result. Due to the extensive use in the industry of alloys based on magnesium, titanium, and aluminum, as well as new marks of steel and other materials sensitive to thermal effects, the study of thermal processes at friction becomes extremely important. In particular, it is necessary to note use of friction at braking. The frictional materials used in brake units should provide the necessary value and stability of coefficient of friction. The problem is that in heavy braking modes, the coefficient of friction, as well as the material properties, become thermally sensitive. In this case, one of the ways to improve the frictional properties is the thermal barrier coating (TBC) method.

The physical and mechanical state of the surface layers of rubbing elements is determined not only by the contact temperature, which can be measured experimentally, but by the entire space–time temperature field. In particular, gradients of temperature and rate of change of temperature field have the major value. These factors have unambiguous functional relationships with the kinematic and dynamic parameters of the friction mode, material properties, cooling intensity, and many other parameters. There is a need for a comprehensive study, using all methods available, to investigate the temperature field and the stress state initiated by it. Reliable results can be obtained only with a reasonable combination of theory and experiment.

Prof. Aleksander Yevtushenko
Prof. Michal Kuciej
Guest Editors

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