Effect of two-stage aging on superplasticity of Al-Li alloy

罗智辉; 张新明; 杜予晅; 叶凌英

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Effect of two-stage aging on superplasticity of Al-Li alloy

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＜正＞The effect of two-stage aging on the microstructures and superplasticity of 01420 Al-Li alloy was investigated by means of OM, TEM analysis and stretching experiment. The results demonstrate that the second phase particles distributed more uniformly with a larger volume fraction can be observed after the two-stage aging （120℃, 12 h+300℃, 36 h） compared with the single-aging（300℃, 48 h）. After rolling and recrystallization annealing, fine grains with size of 8-10 urn are obtained, and the superplastic elongation of the specimens reaches 560% at strain rate of 8×10-4s-1 and 480℃. Uniformly distributed fine particles precipitate both on grain boundaries and in grains at lower temperature. When the sheet is aged at high temperature, the particles become coarser with a large volume fraction.

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《中国有色金属学报：英文版》 |2006年第s3期|1375-1378|共4页
作者
罗智辉; 张新明; 杜予晅; 叶凌英;
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作者单位

School of Materials Science and Engineering Central South University;

Changsha 410083;

China;

School of Materials Science and Engineering;

Central South University;

Changsha 410083;

China;

School of Materials Science and Engineering;

Central South University;

Chan;

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原文格式 PDF
正文语种 chi
中图分类 TG113.253;
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机译：铝锂合金;超塑性;两阶段时效;晶粒细化;

Effect of two-stage aging on superplasticity of Al-Li alloy

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