Tensile properties of 2024 Al alloy processed by enhanced solid-solution and equal-channel angular pressing

许晓静; 曹进琪; 程晓农; 莫纪平

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Tensile properties of 2024 Al alloy processed by enhanced solid-solution and equal-channel angular pressing

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＜正＞Equal-channel angular pressing（ECAP） of an enhanced solid-solution treated 2024 Al alloy was successfully performed at room temperature, with an imposed equivalent normal strain of about 0.5. A very high hardness about HV191 and yield strength about 610 MPa （30% higher than those of the unECAPed 2024 Al alloy） in terms of commercial aluminum alloys were observed for the ECAPed 2024 Al alloy. In addition to the strengthening, this process allows the ECAPed 2024 Al alloy have a moderate level of tensile ductility （about 12.7%） and a significant strain hardening capability up to tensile failure. After aged at 373 K for 48 h, the ECAPed alloy increases its hardness （about HV201） and tensile ductility （about 14 %） further. The TEM results show that the ECAPed 2024 Al alloy presents a plate structure （about 50-100 nm） with high density of dislocation and additional thin plate (approximately ＜10 nm= inside. The XRD results show that the ECAP processing decreases the texture and increases the dislocation density of the alloy considerably. The theoretical calculations show that the increase of dislocation density resulting from ECAP processing makes a considerable contribution about 55.2 % for the improvement of yield strength.

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《中国有色金属学报：英文版》 |2006年第s3期|1541-1544|共4页
作者
许晓静; 曹进琪; 程晓农; 莫纪平;
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作者单位

School of Mechanical Engineering Jiangsu University;

Zhenjiang 212013;

China;

School of Mechanical Engineering;

Jiangsu University;

Zhenjiang 212013;

China;

School of Mechanical Engineering;

Jiangsu University;

Zhenjiang 212013;

China;

School of Mechanical Engineeri;

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原文格式 PDF
正文语种 chi
中图分类压力加工工艺;
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机译：铝合金;强化固溶处理;等径角挤压;力学性能;

Tensile properties of 2024 Al alloy processed by enhanced solid-solution and equal-channel angular pressing

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