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http://dx.doi.org/10.7777/jkfs.2019.39.5.94

Evaluation of Microstructure and Formability of Rheocasting Aluminum Alloy by Inclined Cooling Plate  

Hwang, Bum-Kyu (MAGMA Engineering Korea Co., LTD.)
Kim, Soon-Kook (Dept. of Advanced Material Engineering, Dong-Eui Univ.)
Kim, Duck-Hyun (Gyeongsang National Univ.)
Lim, Su-Gun (Dept. of Metallurgical and Materials Engineering, ReCAPT, Gyeongsang National Univ.)
Publication Information
Journal of Korea Foundry Society / v.39, no.5, 2019 , pp. 94-101 More about this Journal
Abstract
This study investigated the microstructure properties of A356 and AC8A alloys with a rheocasting mold using an inclined cooling plate. In addition, a formability evaluation was performed according to the solid fraction. Regardless of the position, the overall microstructure was shown to be uniform and a finer crystal structure was obtained as the solid fraction increased. The study confirmed that the molding pattern changed according to the solid fraction and that the spherical α-Al and eutectic α were identified. The results of the formability according to the solid fraction of A356 and AC8A alloys were similar to the simulation results.
Keywords
Cooling plate; Rheocasting; A356 and AC8A alloys;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Shim SY, Park HW, Jeong IS and Lim SG, World Scientific, "The optimizing conditions by taguchi method for fabricasting semi-solid Al-Zn-Mg alloy slurry by cooling plate method", 17 (2010) 185-188.
2 Bonollo F, Chiarmetta G, Gramegna N and Parona P, Proc. Conf., "Numerical simulation of semi-solid casting of an automotive component", (2000) 1-6.
3 Tsai FY and Kao PW, "Improvement of mechanical properties of a cast Al-Si bas alloy by friction stir processing", 80 (2012) 40-42.   DOI
4 Murali S, Arvind TS, Raman KS and Murthy KSS, Materials Transactions, "Fatigue properties of sand cast, stircast and extruded Al-7Si-0.3Mg alloy with trace additions of Be and Mn", 38 (1997) 28.   DOI
5 J Jpn. Inst. Light Met., The Structure and Properties of aluminum, The Japan Institute of Light Metals, Tokyo (1991) 231.
6 Kim WB, Kim JH and Ye BJ, J. Korea Foundry Society, "Characteristics of modification in the hypoeutectic Al-Si alloys", 18 (1998) 604-612.
7 Jung BJ, Soichiro Ichihata, Tatsuo Sato, Hiroyasu Tesuka, Akihiko Kamio, Seiji Saikawa and Kiyoshi Nakai, J.Jpn. Inst. Light Met., "Semi-solid solidification microstructures of a strain-induced Al-7%Si-0.5%Mg alloy", 47 (1997) 626.   DOI
8 Yim CD and Shin KS, J. Korea Foundry Society, "Microstructural change in rheocast AZ91D magnesium alloys with stirring rate and isothermal stirring temperature", 23 (2003) 130-136.
9 Kim SW, Kang YC, Kim DK And Sinji Kumai, J. Korea Foundry Society, "Microstructural and mechanical charateristics of A356 ally cast by semi-solid squeeze process", 20 (2000) 269-276.
10 Moon JY, Kim HS, and Hong CP, J. Korea Foundry Society, "Flow characteristic of hybrid-lower arm on casting parameters in rheocasting process", 28 (2008) 231-236.
11 Kim DH, Shim SY, Kim YH and Lim SG, J. Korea Foundry Society, "RRA treatment of semi-solid Al-Zn-Mg Cu Al alloy fabricated by cooling plate", 29 (2009) 265-269.
12 Kim DH, Jung HJ, Shim SY, Lim SY and Lee SY, J. Korea Foundry Society, "Thixo extrusion and reheating characteristics of semi solid A356 alloy", 34 (2014) 123-129.   DOI