Article ID Journal Published Year Pages File Type
1606076 Journal of Alloys and Compounds 2016 10 Pages PDF
Abstract
Al-Zn-based alloys with high strength of >470 MPa for die-casting were successfully fabricated without melt modification and post-casting heat treatment. We designed Al-based alloys containing more than 20 wt% of Zn for the die-casting process. The matrix phase of the alloy was angular α-Al surrounded by a very fine lamellar structure of α-Al and η-Zn. The average grain size of the matrix was relatively small (∼25 μm), and a complex network of eutectoid α + η, supersaturated η, β, and Cu-related intermetallic particles formed at the grain boundaries or non-equilibrium solidification phases. This microstructural feature obtained by the addition of more than 20 wt% Zn significantly enhanced the strength of the Al-Zn-based alloys. Furthermore, we investigated the fluidity and wear properties of the developed alloys, which improved as the Zn content was increased.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
Authors
, , ,