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http://dx.doi.org/10.12656/jksht.2018.31.3.97

Two-step Solution Treatment for Enhancement of Mechanical Properties of AlSiCu Aluminum 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 for Heat Treatment / v.31, no.3, 2018 , pp. 97-103 More about this Journal
Abstract
The objective of this study is to develop the mechanical properties of AlSiCu aluminum alloy by the two-step solution heat treatment. The microstructure of gravity casting specimen represents a typical dendrite structure having a secondary dendrite arm spacing (SDAS) of 40 mm. In addition to the Al matrix, a large amount of coarsen eutectic Si phase, $Al_2Cu$ intermetallic phase, and Fe-rich phases are generated. The eutectic Si phases are fragmented and globularized with solution heat treatment. Also, the $Al_2Cu$ intermetallic phase is resolutionized into the Al matrix. The $2^{nd}$ solution temperature at $525^{\circ}C$ might be a optimum condition for enhancement of mechanical properties of AlSiCu aluminum alloy.
Keywords
Two-step solution; AlSiCu; dendrite; intermetallic;
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