The Effects of Different Cooling Rate Conditions on the Thermal Profile and Microstructure of Al-Si Alloy with Magnesium Addition

Muhammad Faez, Mohamad Tajudin and Asnul Hadi, Ahmad and Juliawati, Alias and Nur Azhani, Abd Razak and Nasrul Azuan, Alang (2024) The Effects of Different Cooling Rate Conditions on the Thermal Profile and Microstructure of Al-Si Alloy with Magnesium Addition. In: AIP Conference Proceedings. The 5th International Conference on Automotive Innovation & Green Energy Vehicle 2022 , 5-6 December 2022 , Langkawi, Malaysia. pp. 1-9., 2998 (060002). ISBN 978-0-7354-4793-6

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Abstract

Thermal analysis is a technique that has played an important role in the characterization and development of the material. The aim of this study is to investigate the effect of magnesium addition on the cooling rate of an Al-Si alloy with magnesium addition using the method CCA-CA. In this work, a graphite crucible containing Al-Si alloy with an addition of 1% magnesium and up to the temperature of 800 °C was heated using induction furnace. The cooling curve was determined by K-type thermocouples. One K-type thermocouple was placed in the centre of the crucible and the other near the wall of the crucible. Both K-type thermocouples were submerged to 20 mm in the melt. The crucible was left in a chamber with a Kaowool insulator and in an open environment with additional minimal ventilation to achieve the slow and rapid cooling rate condition. The slow and fast cooling rates were calculated at 0.17 °C/s and 1.578 °C/s respectively. The temperature of liquids and solidus of the slow cooling rate condition was found at 579 °C and 464 °C respectively. Meanwhile, the liquidus and solidus temperature of fast cooling rate was at 577 °C and 477 °C. Furthermore, the microstructure formation of different cooling rate conditions were observed. The results show that the increased cooling rate condition refined the grain structure, enhance the grain globularity and reduced the aspect ratio.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Thermal analysis, Thermocouples, Carbon based materials, Chemical elements
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Faculty/Division:	Institute of Postgraduate Studies Centre of Excellence: Automotive Engineering Centre Centre of Excellence: Automotive Engineering Centre Faculty of Mechanical and Automotive Engineering Technology
Depositing User:	Miss Amelia Binti Hasan
Date Deposited:	03 Dec 2023 13:49
Last Modified:	25 Mar 2024 01:04
URI:	http://umpir.ump.edu.my/id/eprint/39139
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