Influence of intermediate annealing temperature on strength of repeat cold-rolled Al-Mg-Sc-Zr alloy

Acta Metall Sin

2008, Vol. 44

Issue (10): 1209-1212 DOI:

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Influence of intermediate annealing temperature on strength of repeat cold-rolled Al-Mg-Sc-Zr alloy

Gang Du;Desheng Yan;

中国科学院金属研究所特殊环境材料研究部

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Gang Du; Desheng Yan. Influence of intermediate annealing temperature on strength of repeat cold-rolled Al-Mg-Sc-Zr alloy. Acta Metall Sin, 2008, 44(10): 1209-1212 .

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Abstract Influence of intermediate annealing temperature on strength of repeat cold -rolled Al-Mg-Sc-Zr alloy was studied. It was found that intermediate annealing at 400℃ has no obvious effect on the strength of the alloy, while it decreases with the rolling times，especially for yield stress, when 450℃ intermediate annealing was applied. High density of dislocations induced by cold rolling will provide fast diffusion channel for Sc and Zr atoms and promot the coarsening of the Al3(Sc, Zr) particles when samples were annealed at 450℃. As a result, Al3(Sc, Zr) particles had weak ability to hinder the movement of dislocations and recovery process of alloy, and the strength of the alloy were decreased.

Key words: intermediate annealing Al3(Sc Zr) fast　diffusion　channel misfit strains

Received: 22 January 2008

ZTFLH:

TG113.25

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2008/V44/I10/1209

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