Abstract
Abstract Automotive heat exchanger materials with high strength and excellent corrosion resistance performance are highly required due to the increasing demands of weight reduction and fuel economy. In this work, 0.16 wt% Zr was added into a Al-1.5Mn-0.3Fe-0.6Si-0.5Cu(wt.%) alloy for the improvement of the related performance. The microstructure, mechanical properties and electrochemical properties were investigated. The results indicate that Zr addition can decrease grain size and increase the volume fraction of low angle boundaries (LAGBs) in the alloy. The improved strength derives from finer grain sizes and Al3Zr particle. The enhanced pitting corrosion resistance mainly results from the higher volume fraction of LAGBs and smaller grain sizes.
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