Effects of Cu Addition on Nanocluster Formation and Two-Step Aging Behaviors of Al–Mg–Si Alloys
Two types of nanoclusters, i.e., Cluster (1) and Cluster (2), are detected in both Cu-free and Cu-added alloys. The Cu addition to the Al–Mg–Si alloys highly suppresses the formation of Cluster (1) at the initial stage of natural aging and causes higher peak hardness. The
over-aging is suppressed in the Cu-added alloy, showing higher thermal stability.
Keywords: AL-MG-SI ALLOY; CU ADDITION; NANOCLUSTERS; NATURAL AGING; TWO-STEP AGING
Document Type: Research Article
Publication date: 01 February 2011
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