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http://dx.doi.org/10.12656/jksht.2022.35.3.150

Effect of Sc Addition on the Microstructure Modification of Al-6Si-2Cu Alloy  

An, Seongbin (Department of Advanced Materials Engineering, Chosun University)
Kim, Chungseok (Department of Materials Science and Engineering, Chosun University)
Publication Information
Journal of the Korean Society for Heat Treatment / v.35, no.3, 2022 , pp. 150-158 More about this Journal
Abstract
The effects of scandium addition on the Al-6Si-2Cu Alloy were investigated. The Al-6Si-2Cu-Sc alloy was prepared by gravity die casting process. In this study, scandium was added at 0.2 wt%, 0.4 wt%, 0.8 wt%, and 1.0 wt%. The microstructure of Al-6Si-2Cu-Sc alloy was investigated using Optical Microscope, Field Emission Scanning Electron Microscope, Electron Back Scatter Diffraction, and Transmission Electron microscope. The microstructure of Al-6Si-2Cu alloy with scandium added changed from dendrite structure to equiaxed crystal structure in specimens of 0.4 wt% Sc or more, and coarse needle-shape eutectic Si and β-Al5FeSi phases were segmented and refined. The nanosized Al3Sc intermetallic compound was observed to be uniformly distributed in the modified Al matrix.
Keywords
Al-Si-Cu alloy; Scandium; modification; eutectic Si;
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