M. Markushev, E. Avtorkatova, R. Ilyuasov, I. Valeev, A. Valeeva, S. Krymskiy, O. Sitdikov
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Effect of High-Dense Electropulsing on Structure and Strength of Cryorolled Metals
A comparative analysis of changes in structure and ambient temperature mechanical behavior of pure FCC metals—Al, Ni and Cu, due to high-dense electropulsing (HDEP) of isothermally cryorolled at liquid nitrogen temperature sheets, has been carried out. Processes, driving forces and factors controlling the nature and kinetics of transformation of the deformation structure during HDEP are discussed. Temperature ranges of activation of recovery and recrystallization in the cryorolled metals under pulsing of different capacity are determined. It is shown that the processing allows controlling strength of metals within a wide range owing to formation of homogeneous and/or heterogeneous structures with different crystallite size, dislocation density and grain boundary spectrum, involving ultra-fine grained and nanostructured ones. It is concluded that the phenomenology and nature of metal softening under electric pulsing are similar to those, occurred at conventional furnace annealing.
期刊介绍:
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.