Structural changes during annealing of submicro- and nanocrystalline aluminum alloys

被引：2
|
作者：
Tsenev, N. K. [1 ]
Perevezentsev, V. N. [2 ]
Shcherban', M. Yu. [3 ]
Tsenev, A. N. [1 ]
机构：
[1] ZAO Konstruktsiya, Moscow 105066, Russia
[2] Russian Acad Sci, Nizhni Novgorod Branch, Blagonravov Inst Engn Sci, Nizhnii Novgorod 603024, Russia
[3] Nizhnii Novgorod State Univ, Nizhnii Novgorod 603950, Russia
来源：
TECHNICAL PHYSICS | 2010年 / 55卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
STRAIN-RATE SUPERPLASTICITY;
D O I：
10.1134/S1063784210060125
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
引用
收藏
页码：822 / 826
页数：5
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