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Information × Registration Number 0225U001022, (0123U102013) , R & D reports Title Modification of the surface properties of intermetallics with shape memory effect by milling texturing popup.stage_title Накопичення вихідних даних для розробки інноваційної технології поверхневого фрезерного текстурування матеріалів з ЕПФ: 1. Адаптація методу мультифрактального аналізу до характерізації стану текстурованої поверхні; 2. Експериментальне визначення сил різання, якості поверхні та стійкості інструментів; 3. Чисельне моделювання сил різання, полів напружень і температур. Head Balytska Nataliia O., к.т.н. Registration Date 23-01-2025 Organization Zhytomyr Polytechnic State University popup.description1 Development of a technology for highly efficient milling texturing of surfaces to modify the functional properties of products made from shape memory materials. popup.description2  The dependence of the contact angle of milled nitinol surfaces on the geometrical parameters of surface textures was experimentally investigated. The adaptation of software for calculating multifractal parameters of photos of textured surfaces allowed to study the influence of the shape and parameters of surface textures on the fractal dimension of the area of surface elements. This made it possible to improve the mathematical model of the contact angle of a textured surface depending on the contact angle of a smooth surface and its fractal parameters for the Wenzel state. The kinetics of droplet spreading along macro-, micro-, and fractal profiles was studied by means of modelling using the Boltzmann lattice equations. While a regular macrorelief inhibits spreading, microrelief and fractal relief accelerate spreading and, under favourable conditions, lead to complete wetting of such a relief surface. An experiment to study the process of dry micromilling of nitinol has shown that the cutting forces have a significant dynamic component, which is explained by the periodic bending of the tool due to its low rigidity. The dependence of burr sizes on cutting conditions was established and it was proved that to reduce them, it is advisable to reduce the depth of cut and increase the feed rate. The greatest influence on the stability of micro-milling cutters is exerted by the depth of cut and feed, the method of cutting into the workpiece, as well as the quality of surface and edge pretreatment. Using finite element modelling, it was found that the specific cutting forces reach satisfactory values at a scale coefficient of 0.5 and then remain almost constant. At low feed rates (up to 0.0002 mm/tooth), the specific cutting forces are too high (up to 3000 GPa), and at higher feed rates, there is a risk of tool breakage and an increase in burr size. Rational feed rates are 0.001...0.005 mm/tooth at a cutting depth of up to 0.03 mm and a cutting speed of 20 m/min. Product Description popup.authors Yevhlievskyi Stiefan S. Vyhovskyi Heorhii M. Hlembotska Larysa Ye. Klymenko Serhii A. Kryzhanivskyi V'iacheslav B. Manokhin Andrii S. Melnyk Oleksandr L. Polonskyi Leonid H. Prylypko Oleksandr I. Tomashevskyi Oleh O. popup.nrat_date 2025-01-23 Close