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Metals 2017, 7(7), 262;

Effect of Fe-Content on the Mechanical Properties of Recycled Al Alloys during Hot Compression

School of Resources and Environmental Engineering, East China University of Science and Technology, Meilong Road 130, Xuhui District, Shanghai 200237, China
State Key Laboratory of Rolling & Automation, Northeastern University, Box 105, No. 11, Lane 3, Wenhua Road, Heping District, Shenyang 110819, China
China Automotive Engineering Research Institute, No. 9 Jinyu Ave., New North Zone, Chongqing 401122, China
Author to whom correspondence should be addressed.
Received: 10 June 2017 / Revised: 28 June 2017 / Accepted: 7 July 2017 / Published: 10 July 2017
(This article belongs to the Special Issue Light Weight Alloys: Processing, Properties and Their Applications)
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It is unavoidable that Fe impurities will be mixed into Al alloys during recycling of automotive aluminum parts, and the Fe content has a significant effect on the mechanical properties of the recycled Al alloys. In this work, hot compression tests of two Fe-containing Al alloys were carried out at elevated temperatures within a wide strain rate range from 0.01 s−1 to 10 s−1. The effect of Fe content on the peak stress of the stress vs. strain curves, strain rate sensitivity and activation energy for dynamic recrystallization are analyzed. Results show that the recycled Al alloy containing 0.5 wt % Fe exhibits higher peak stresses and larger activation energy than the recycled Al alloy containing 0.1 wt % Fe, which results from the fact that there are more dispersed AlMgFeSi and/or AlFeSi precipitates in the recycled Al alloy containing 0.5 wt % Fe as confirmed by SEM observation and energy spectrum analysis. It is also shown that the Fe content has little effect on the strain rate sensitivity of the recycled Al alloys. View Full-Text
Keywords: Al alloy; remanufacturing; hot rolling; activation energy Al alloy; remanufacturing; hot rolling; activation energy

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Lu, H.; Hou, Z.; Ma, M.; Lu, G. Effect of Fe-Content on the Mechanical Properties of Recycled Al Alloys during Hot Compression. Metals 2017, 7, 262.

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