Ruslan Z. Valiev
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia
Laboratory for Mechanics of Bulk Nanomaterials, Saint Petersburg State University, Saint Petersburg, Russia
Multiple studies in recent years have proved severe plastic deformation (SPD) techniques as a very efficient way to produce nanostructured metals and alloys with significantly improved mechanical and functional properties, the latter affected by several factors, including ultrafine grains and also the atomic structure of boundaries in resulting nanomaterials [1,2]. This report presents the results of complex studies of the formation of different grain boundaries (low angle and high angle ones, special and random, equilibrium and non-equilibrium with strain-distorted structure as well as with the presence of grain boundary segregations and precipitations) in nanostructured materials processed using SPD with various regimes and routes. This entails the materials with superior multifunctional properties [3,4], i.e. the combination of high mechanical and functional properties (corrosion and radiation resistance, electrical conductivity, etc.) that are induced by grain boundary design. Particular emphasis is laid on the physical nature and the use of multifunctional nanomaterials for their innovative applications in medicine and engineering.
Acknowledgement: This research was supported in part by the Ministry of Science and Higher Education of the Russian Federation under grant agreement No. 14.586.21.0061 (unique project identifier RFMEFI58618X0061).
Reference:
- R.Z. Valiev, Nanostructuring of metals by severe plastic deformation for advanced properties, Nature Materials, Volume: 3, Pages: 511-516, 2004
- R.Z. Valiev, A.P. Zhilyaev, T.G. Langdon, Bulk Nanostructured Materials: Fundamentals and Applications, 2014 by John Wiley & Sons, Inc.
- I. Sabirov, N.A. Enikeev, M.Y. Murashkin, R.Z. Valiev, Bulk nanostructured materials with multifunctional properties, Series: SpringerBriefs in Materials, Springer, 2015, IX, 161 p.
- K. Edalati, T. Masuda, M. Arita, M. Furui, X. Sauvage, Z. Horita, R.Z. Valiev, Room-temperature superplasticity in an ultrafine-grained magnesium alloy, Scientific Reports, Volume 7: 2662, Pages: 1-9, 2017
