This article is cited in 2 papers

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Structural changes during annealing of submicro- and nanocrystalline aluminum alloys

N. K. Tsenev^a, V. N. Pereverzentsev^b, M. Yu. Shcherban^c, A. N. Tsenev<sup>a

a</sup> ZAO Konstruktsiya, Moscow, 105066, Russia
^b A. A. Blagonravov Mechanical Engineering Institute, Academy of Sciences of the USSR, Nizhny Novgorod Branch
^c Lobachevsky State University of Nizhny Novgorod

Abstract: The annealing-induced evolution of the structure and microhardness of submicro-and nanocrystalline Al–3% Mg and Al 1570 alloys produced by torsional severe plastic deformation are studied. Annealing of the Al–3% Mg alloy at 373–423 K and annealing of the Al 1570 alloy at 373–473 K are shown to result in the relaxation of internal stresses and subsequent normal grain growth. As the annealing temperature increases, the microhardness decreases. At higher temperatures (473 K for the Al–3% Mg alloy and 573 K for the Al 1570 alloy), anomalous grain growth takes place. This growth is accompanied by the appearance of numerous grains with a high dislocation density, a high concentration of impurity atoms in grain boundaries, and an increase in the microhardness. These effects are explained.

Received: 01.07.2009
Accepted: 24.11.2009

 English version: Technical Physics, 2010, 55:6, 822–826

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