The Change of Solidification Parameters on Hypoeutectic Aluminum-Silicon Alloy Under Different Cooling Rates

X. H., Ma and N. A., Abd Razak (2023) The Change of Solidification Parameters on Hypoeutectic Aluminum-Silicon Alloy Under Different Cooling Rates. In: Technological Advancement in Mechanical and Automotive Engineering: ICMER 2021, 26-27 October 2021 , Virtual Conference: Universiti Malaysia Pahang. pp. 263-278.. ISBN 978-981-19-1457-7

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Computer-aided cooling curve analysis (CA-CCA) is a cost-saving and easy-to-use thermal analysis tool to identify the solidification characteristics of a material. This paper aims to present the relationship between cooling rate and solidification parameters of aluminum–silicon alloy before semisolid metal processing. An induction furnace was used to melt the as-prepared specimen by heating the respective graphite crucible to 680 ℃ and left it to be cooled and solidified under three different cooling rate conditions. A double thermocouple method was employed by placing one K-type thermocouple at the crucible center and another one near to the crucible wall. Both thermocouple sensors were connected to a data acquisition device, NI 9219 which was linked to a computer with DASYLab pre-installed inside for data logging, along with OriginPro 2019b for graphical representation. Low, intermediate, and high cooling rate conditions were achieved when the crucible was cooled with its top and bottom surface enclosed with Fiberfrax felt (1.0 ℃/s), at ambient temperature (1.3 ℃/s), and by a compressed air flow supplied from air compressor (1.9 ℃/s), respectively. The increase in cooling rate facilitates the nucleation rate and the growth of crystals within the alloy system and thus leads to a shorter solidification time with all the critical points highlighting the phase transition are shifted accordingly.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Lecture Notes in Mechanical Engineering
Uncontrolled Keywords: CA-CCA, Cooling rate, Aluminum–silicon alloy, Solidification parameters
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Faculty/Division: Institute of Postgraduate Studies
Faculty of Manufacturing and Mechatronic Engineering Technology
Faculty of Mechanical and Automotive Engineering Technology
Depositing User: Noorul Farina Arifin
Date Deposited: 12 Oct 2022 06:28
Last Modified: 12 Oct 2022 06:28
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