EVOLUTION OF MICROSTRUCTURE OF COPPER AND ITS ALLOYS DURING SEVERE PLASTIC DEFORMATION PROCESS
Volokitin A.V. Denissova A.I. Fedorova T.D. Lavrinuk D.N.
2024G.V. Kurdyumov Institute for Metal Physics of N.A.S. of Ukraine
Progress in Physics of Metals
2024#25Issue 2294 - 319 pp.
The changes in the properties of copper and its alloys as a result of severe plastic deformation (SPD) are reviewed. The literature review shows that contemporary materials science is aimed at solving the problem of producing ultrafine-grained materials with high-angle grain boundaries. With using of the methods of severe plastic deformation, it is possible to obtain so-called bulk nanostructured materials with grain sizes of 0.1– 0.2 microns and specific substructures containing the lattice and grain-boundary dis-locations. Such structures are characterised by large elastic distortions of the crystal lattice. It is believed that such fine-grained structures should simultaneously provide a high level of plastic and strength characteristics due to special stressed high-angle grains. The article discusses SPD methods such as torsion with shear, equal-channel angular pressing, screw extrusion, all-round forging, rolling with shear, etc. Among the most significant results of SPD, it is worth highlighting the increase in strength, fatigue resistance and elastic properties of the material. These changes make copper and its alloys subjected to SPD very attractive for use in many industries, including electrical engineering, aviation, medicine, etc.
copper , copper alloys , fine-grained microstruc-ture , mechanical properties , severe plastic deformation
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