@inproceedings{d655d30126484f26bc964c1cc8b2a07b,
title = "Effect of Ultrasonic Melt-Treatment and Cooling Rate on Microstructure of Multi-phase Reinforced Al Alloy",
abstract = "Al–xMg–10Si–10Cu–10Zn (in wt\%) alloy is fabricated with a high volume fraction of coarse multi-phase particles in the aluminum matrix. Permanent mold casting is carried out with a selective ultrasonic melt-treatment for 60 s at 1000 K. A step mold is used to achieve three different cooling rates. Blocky primary Mg2Si particles are homogeneously distributed through the Al matrix and eutectic phases such as Si, Q–Al5Cu2Mg8Si6, and θ-Al2Cu are found in the dendritic boundaries. Ultrasonication significantly decreases the porosity and the size of microstructural constituents such as primary Mg2Si phases. Refinement of primary Mg2Si by ultrasonication is more effective in the specimens with higher cooling rates. The compressive properties at room temperature and 623 K are enhanced in the ultrasonicated alloys. By heat treatment at 713 K, very fine θ′ precipitates with size less than 10 nm are formed through the Al matrix and blocky Mg2Si and Q phases were spheroidized.",
keywords = "Aluminum alloy, Cooling rate, Microstructure, Multi-component, Ultrasonic melt treatment",
author = "Kwangjun Euh and Jung, \{Jae Gil\} and Kim, \{Ju Hye\} and Baek, \{Eun Ji\} and Lee, \{Jung Moo\}",
note = "Publisher Copyright: {\textcopyright} The Minerals, Metals \& Materials Society 2018.; International symposium on Light Metals, 2018 ; Conference date: 11-03-2018 Through 15-03-2018",
year = "2018",
doi = "10.1007/978-3-319-72284-9\_118",
language = "English",
isbn = "9783319722832",
series = "Minerals, Metals and Materials Series",
publisher = "Springer International Publishing",
pages = "907--911",
editor = "Olivier Martin",
booktitle = "Light Metals 2018",
}