DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1201 - 1207
Section Micro-Structural Effects
Published online 15 September 2009
DYMAT 2009 (2009) 1201-1207
DOI: 10.1051/dymat/2009169

Formation of bulk nanostructure metals under dynamic loading

E.V. Shorokhov1, I.N. Zhgilev1, V.I. Zeldovich2, I.G. Brodova2, I.V. Khomskaya2, A.V. Abramov1, I.V. Minaev1, N.Yu. Frolova2, N.E. Zababakhin1, N.P. Oglezneva1, P.A. Nasonov1 and I.G. Shirinkina2

1  Russian Federal Nuclear Center - Zababakhin All-Russia Research Institute of Technical Physics, 456770 Snezhinsk, Russia
2  Institute of Metal Physics, RAS Ural Branch, 620041 Ekaterinburg, Russia

Published online: 15 September 2009

Structural changes observed in samples of technical-purity titanium, copper, and aluminum alloy AMts (Al–Mn) after severe plastic deformation were studied and results of this investigation are presented. In experiments, materials were loaded with the help of a gun. Samples were accelerated up to the velocity of about 100–400 m/s and then directed into a special matrix consisting of two channels located at 90° to one another. These samples were deformed with the strain rate of ~ 105 s−1; the stagnation pressure in the channel ranged from 2 to 5 GPa. Consideration is given to the relation between loading conditions and the specific nature of structure formation in materials. Under dynamic loading, the coarse-grained structure of the grain in the aluminum alloy becomes ~ 400 nm, and the sub-grain structure with the size of 50–100 nm is formed in copper. Microhardness of materials increases 1.5–2 times.

© EDP Sciences 2009