Peculiarities of the Rheological Behavior for the Al-Mg-Sc-Zr Alloy Under High-Temperature Deformation

被引：11

作者：

Smirnov, A. S. ^{[1
]}

Konovalov, A. V. ^{[1
]}

Pushin, V. G. ^{[2
]}

Uksusnikov, A. N. ^{[2
]}

Zvonkov, A. A. ^{[3
]}

Zajcev, I. M. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst Engn Sci, Ural Branch, Ekaterinburg 620049, Russia

[2] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[3] Acad VP Makeyev State Rocket Ctr, Miass 456300, Chelyabinskaya, Russia

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2014年 / 23卷 / 12期

关键词：

aerospace; aluminum; intermetallic; STRAIN RATE SUPERPLASTICITY; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURE; ECAP;

D O I：

10.1007/s11665-014-1211-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper deals with a peculiar rheological behavior of the Al-Mg-Sc-Zr alloy at deformation temperatures of 330 and 360 A degrees C and a strain rate of 0.05 s(-1). It has been found that the strain resistance curve for this material consists of several portions. First there is material hardening, then softening, and again hardening. The application of the electron backscatter diffraction technique and transmission electron microscopy has elucidated that in-situ recrystallization is the main process of softening at the temperatures studied. The appearance of the second portion of hardening on the strain resistance curve results from inhibited in-situ recrystallization. At the deformation temperature of 330 A degrees C, as distinct from the temperature of 360 A degrees C, a small number of grains are formed on the boundaries of original grains because of insufficiently active dynamic polygonization. The presence of abounding intermetallics in the microstructure causes the development of the barrier effect of blocking free dislocations, grain and subgrain boundaries by intermetallics, thus enhancing material hardening.

引用

页码：4271 / 4277

页数：7

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