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This article is cited in 31 scientific papers (total in 31 papers)
Mechanical properties, strength physics and plasticity
Effect of annealing on the microstructure and mechanical properties of ultrafine-grained commercially pure Al
A. M. Mavlyutova, T. A. Latyninaab, M. Yu. Murashkincd, R. Z. Valievcd, T. S. Orlovaab a St. Petersburg National Research University of Information Technologies, Mechanics and Optics
b Ioffe Institute, St. Petersburg
c Saint Petersburg State University
d Institute for Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia
Abstract:
The influence of annealing on the microstructure and mechanical properties of ultrafine-grained (UFG) commercially pure aluminum preliminarily subjected to severe plastic deformation by high pressure torsion has been studied. It is found that annealing of the UFG samples in the temperature range 363–473 K for 1 h leads to increases in the conventional yield strength and ultimate tensile strength, which attained maximum values (50 and 30%, respectively) after annealing at 423 K. A key role of nonequilibrium high-angle grain boundaries in the strengthening effect of UFG-Al due to annealing is discussed. The increase in the strength of UFG-Al is accompanied by a significant decrease in its ductility. A new approach of increasing the ductility of UFG-Al with retaining a high strength is proposed. It is an introduction of additional dislocation density to a UFG structure relaxed by annealing.
Received: 27.03.2017
Citation:
A. M. Mavlyutov, T. A. Latynina, M. Yu. Murashkin, R. Z. Valiev, T. S. Orlova, “Effect of annealing on the microstructure and mechanical properties of ultrafine-grained commercially pure Al”, Fizika Tverdogo Tela, 59:10 (2017), 1949–1955; Phys. Solid State, 59:10 (2017), 1970–1977
Linking options:
https://www.mathnet.ru/eng/ftt9427 https://www.mathnet.ru/eng/ftt/v59/i10/p1949
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