Characteristics of superplasticity in an ultrafine-grained aluminum alloy processed by ECA pressing

被引：84
作者：
Islamgaliev, RK
Yunusova, NF
Valiev, RZ
Tsenev, NK
Perevezentsev, VN
Langdon, TG
机构：
[1] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia
[2] Ufa State Petr Tech Univ, Inst Chem Technol, Ufa 450062, Russia
[3] Mech Engn Res Inst, Nizhny Novgorod Branch, Nizhnii Novgorod 603024, Russia
[4] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[5] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
来源：
SCRIPTA MATERIALIA | 2003年 / 49卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
aluminum alloy; equal-channel angular pressing; grain boundary sliding; superplasticity; transmission electron microscopy;
D O I：
10.1016/S1359-6462(03)00291-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Equal-channel angular pressing was used to process a commercial 1421 aluminum alloy at temperatures from 340 to 410 degreesC. An optimum ultratine microstructure was achieved after pressing at 370 degreesC with an equiaxed grain size of similar to0.3-0.4 mum. Tensile testing showed this material is superplastic at 400 degreesC with elongations up to similar to1500%. Offsets in surface marker tines demonstrate grain boundary sliding is the dominant flow process. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：467 / 472
页数：6
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