Effect of samarium on microstructure and intermetallic formation in Al-5Zn-0.5Si alloy

D. Ferdian, J. R. Pratama, Y. Pratesa

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1 Citation (Scopus)

Abstract

Aluminium-Zinc-Silicon alloy is a material candidate for low voltage sacrificial anode. Nevertheless, iron-rich intermetallic phase that formed in the interdendritic region can reduce its efficiency due to the self-corrosion phenomenon. Samarium addition is expected to modify the formation of iron-rich intermetallic phase. The alloying process was conducted with melting of aluminium and other additional element in mini electric resistance furnace. Furthermore, characterization of the alloys was performed using optical emission spectrometer, differential scanning calorimetry, optical metallography and scanning electron microscopy equipped with energy dispersive spectrometer. The result showed that samarium can refined the secondary dendrite arm spacing (SDAS) from 89.6 μm to 61.4 μm. Samarium also shifted the solidification temperature of the alloy which affected the size of SDAS and formation of Al2Si2Sm intermetallic phase.

Original languageEnglish
Article number012024
JournalIOP Conference Series: Materials Science and Engineering
Volume541
Issue number1
DOIs
Publication statusPublished - 3 Jul 2019
Event2nd International Seminar on Metallurgy and Materials, ISMM 2018 - Tangerang Selatan, Indonesia
Duration: 25 Sep 201826 Sep 2018

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