Microstructure Evolution of a Steel Bar during FEM Simulation of Radial-Shear Broaching and Subsequent Drawing
Еволюція мікроструктури сталевої заготовки під час FEM-моделювання радіально-зсувного проштовхування та наступного волочіння
Volokitina I.E. Panin E.A.
2025G.V. Kurdyumov Institute for Metal Physics of N.A.S. of Ukraine
Metallofizika i Noveishie Tekhnologii
2025#47Issue 111199 - 1213 pp.
The paper presents the results of finite element modelling of the microstruc ture evolution in the implementation of the combined technology of radial shear broaching and subsequent drawing by JMAK and cellular automata methods. The analysis of the results shows that the simulation results have a high degree of convergence with each other; so, it can be recommended to use any of these methods to obtain information about the grain sizes. Workpiece deformation with a diameter of 30 mm to 20 mm at ambient temperature is the most effective method, since it allows refining the initial grain more than 3 times on the workpiece surface, from 25 µm to 8 µm. At the same time, workpiece deformation with a diameter of 30 mm to 23 mm at ambient tem perature gives a twofold refinement of the initial grain, from 25 µm to 12 µm. The processing of the central area of the workpiece in all considered models is insignificant; it reaches only a 35%-reduction under the most op timal conditions.
bar , drawing , radial-shear broaching , severe plastic deformation , steel
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