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Journal Electromagnetic Waves and Electronic Systems №10 for 2016 г.
Article in number:
The formation of the energy state of the surfaces of structural materials based on iron
Keywords: constructional materials performance properties surface layer contact potential difference work function
Authors:
A.K. Gorbunov - Dr.Sc. (Phys.-Math.), Professor, Kaluga branch, Bauman MSTU E-mail: kf_mgtu_fiz@mail.ru M.V. Mousokhranov - Ph.D. (Eng.), Associate Professor, Kaluga branch, Bauman MSTU E-mail: marls77@ya.ru
Abstract:
Numerous studies of the energy potential of bodies in condenced state showed that the electron work function (EWF) is the most capa-cious physical characteristics to determine the top-surface energy of the metal. On the level of EWF the following structural changes in the surface layer influence: the distortion and destruction of the crystal lattice, the process of doping, etc. With the technological formation of surfaces of details made of structural materials based on iron, redistribution of electron density occurs. The goal of this work is the study of physical and mechanical properties of materials based on iron, steel types 45, 40X, X12M. . Each material was machined on the surface grinder innings in the range S of 0.029 to 0.051 mm / stroke. After processing, a determination is made of the electron work function by using a pilot plant. An analysis of the experimental results shows the same pattern for all three construction materials with EWF increased with the growth of pro-longitudinal feed in the grinding surface. Due to the difference of cooling rate of the outer and inner parts of the material, tensile residual stresses are formed on its surface. The higher grinding feed, the higher the temperature in the zone of the cut, and hence higher value of tensile residual stresses. Possibly it causes an increase in EWF.
Pages: 9-12
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