Citation

Mhd Noor, Ervina Efzan and Hao, Jie Kong (2023) The Properties and Microstructure of Na2CO3 and Al-10Sr Alloy Hybrid Modified LM6 Using Ladle Metallurgy Method. Materials, 16 (20). p. 6780. ISSN 1996-1944

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Abstract

In this work, Al-10Sr alloy and Na2CO3 were added to LM6 (reference alloy) as hybrid modifiers through ladle metallurgy. The microstructure enhancement was analyzed using an optical microscope (OM). The results were further confirmed with Scanning Electron Microscope (SEM) and Energy Dispersive X-ray (EDX) spectroscopy. The results showed that Na2CO3 and Al-10Sr alloy successfully hybrid modified the sharp needle-like eutectic Si into fibrous eutectic Si. Soft primary Al dendrites were also discovered after the hybrid modification. The formation of β-Fe flakes was suppressed, and α-Fe sludge was transformed into Chinese script morphology. A 2.13% density reduction was recorded. A hardness test was also performed to investigate the mechanical improvement of the hybrid-modified LM6. 2.3% of hardness reduction was recorded in the hybrid-modified LM6 through ladle metallurgy. Brittle cracks were not observed, while ductile pile-ups were the main features that appeared on the indentations of hybrid-modified LM6, indicating a brittle to ductile transformation after hybrid modification of LM6 by Na2CO3 and Al-10Sr alloy through ladle metallurgy.

Item Type:	Article
Uncontrolled Keywords:	ladle; aluminium; LM6; microstructure; alloy
Subjects:	Q Science > QA Mathematics > QA71-90 Instruments and machines > QA75-76.95 Calculating machines
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	07 Dec 2023 03:43
Last Modified:	07 Dec 2023 03:43
URII:	http://shdl.mmu.edu.my/id/eprint/11944

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