CHANGES IN MICROSTRUCTURE DURING HIGH STRAIN RATE SUPERPLASTIC DEFORMATION OF AN Al-Zn-Mg-Cu-Zr ALLOY CONTAINING Sc

被引：0

作者：

Mukhopadhyay, A. K. ^{[1
]}

Prasad, K. S. ^{[1
]}

Kumar, A. ^{[1
]}

Raveendra, S. ^{[2
]}

Samajdar, I. ^{[2
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[2] Indian Inst Technol, Bombay 400076, Maharashtra, India

来源：

PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON ALUMINUM ALLOYS (ICAA13) | 2012年

关键词：

Al-Zn-Mg-Cu-Zr-Sc alloy; Thermo-mechanical processing; Superplasticity; Recrystallization; Texture; Transmission electron microscopy; 7075; ALUMINUM; RECRYSTALLIZATION;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The changes in microstructure with respect to the variation in morphology of Al3ScxZr1-x dispersoids and evolution of recrystallized grains during superplastic deformation (SPD) (at a temperature and strain rate combination of 475 degrees C, 1.9x10(-2)s(-1)) of a suitably thermo-mechanically processed (TMP) Al alloy 7010 containing Sc have been examined. It is observed that the morphology of Al3ScxZr1-x dispersoids present in the homogenized condition continually changes during subsequent TMP through different stages of SPD process. The number density of the dispersoids is minimal in the TMP condition, whilst the number density of the dispersoids significantly increases with strain during the subsequent SPD process. A simultaneous change in the microstructure during SPD is the gradual increase in the percentage recrystallization with strain. Recrystallization occurred by continuous recrystallization process except at the very early stages of SPD wherein the maximum ODF (orientation distribution functions) intensity (MOI) showed a significant increase coincident with the presence of a reduced number density of the dispersoids in the microstructure.

引用

页码：819 / 824

页数：6

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