Abstract
Mechanical testing is performed and the structure of zirconium and aluminum predeformed by ∼450% using multiaxial forging (MAF) and equal channel angular pressing (ECAP) is investigated. Tensile loading tests of the severely deformed specimens exhibited their tendency to necking, with the ductility of the material in the neck, however, being superior to that in the neck of initial coarse-grained specimens. The results of the experiments imply that a fundamental stage of plastic flow of solids under severe plastic deformation (SPD) is the formation of cellular-banded structure and strain localization in the fine-grain bands. This considerably retards further deformation-induced refinement of the structure by SPD, and also results in the rapid formation of a fracture neck in the materials with this structure.
Similar content being viewed by others
References
O. A. Kaibyshev and F. Z. Utyashev, Superplasticity, Structure Refinement and Processing of Hardly-Deformed Alloys [in Russian], Moscow, Nauka (2002).
Y. Iwashi, Z. Horita, V. Nemoto, and T. G. Langdon, Acta Mater., 46, No. 9, 3317–3331 (1998).
R. Z. Valiev, Yu. Estrin, Z. Horita, et al., JOM, April, 33–39 (2006).
N. M. Rusin, Fiz. Met. Metalloved., 102, No. 2, 1–8 (2006).
Y. Iwahashi, Z. Horita, M. Nemoto, and T. G. Langdon, Metal. and Mater. Transaction., 29A, No. 10, 2503–2510 (1998).
M. V. Markushev and M. Yu. Murashkin, 90, Fiz. Met. Metalloved., No. 5, 92–101 (2000).
N. V. Graivoronskii, G. F. Sarzhan, and S. A. Firsov, Metallofiz. Nov. Tekhnolog., 19, No. 1, 67–73 (1997).
Yu. R. Kolobov, R. Z. Valiev, G. P. Grabovetskaya, et al., Grain-Boundary Diffusion and Properties of Nanostructured Materials [in Russian], Novosibirsk, Nauka (2001).
Yu. R. Kolobov and K. V. Ivanov, in: Nanomaterials by Severe Plastic Deformation (Ed. Z. Horita), Trans Tech Publications LTD (2005).
V. V. Gubernatorov, B. K. Sokolov, I. V. Gervasieva, and L. R. Vladimirov, Physical Mesomechanics, 2, Nos. 1–2, 157–162 (1999).
Y. Fukuda, K. Oh-ishi, M. Furukawa et al., Acta Mater., 52, 1387–1395 (2004).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 43–49, November, 2007.
Rights and permissions
About this article
Cite this article
Rusin, N.M., Poletika, T.M., Girsova, S.L. et al. Distinctive features of plastic strain localization under severe plastic deformation of metals. Russ Phys J 50, 1111–1117 (2007). https://doi.org/10.1007/s11182-007-0163-8
Issue Date:
DOI: https://doi.org/10.1007/s11182-007-0163-8