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http://dx.doi.org/10.14775/ksmpe.2018.17.3.102

Optimal Double Heat Treatment Process to Improve the Mechanical Properties of Lightweight AlSiCu Alloy  

Park, Sang-Gyu (Department of Advanced Material and Engineering, Chosun University)
Kim, Chung-Seok (Department of Materials Science and Engineering, Chosun University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.17, no.3, 2018 , pp. 102-108 More about this Journal
Abstract
The objective of this study is to develop the mechanical properties of an AlSiCu aluminum alloy using the two-step solution heat treatment. The microstructure of the gravity casting specimen represents a typical dendrite structure with a secondary dendrite arm spacing (SDAS) of 40 um. In addition to the Al matrix, a large amount of coarsen eutectic Si phase, $Al_2Cu$ intermetallic phase, and Fe-rich phases is generated. The eutectic Si phases are fragmented and globularized with the solution heat treatment. The $Al_2Cu$ intermetallic phase is also resolutionized into the Al matrix. The $2^{nd}$ solution temperature at $525^{\circ}C$ may be an optimal condition to enhance the mechanical properties of the AlSiCu aluminum alloy.
Keywords
Two-step solution; AlSiCu; Dendrite; Intermetallic;
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Times Cited By KSCI : 1  (Citation Analysis)
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