Volume 8, Issue 12 (December 2021), Pages: 36-42
Original Research Paper
Title: Iron-based intermetallic particles formation in Al-Zn-Si alloy through powder metallurgy route
Author(s): Abdul Khaliq *, I. A. Chaudhry, M. Boujelbene, Ayyaz Ahmad, I. Elbadawi
College of Engineering, University of Ha’il, Ha’il, Saudi Arabia
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* Corresponding Author.
Corresponding author's ORCID profile: https://orcid.org/0000-0002-8512-105X
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Corrosion of the steel products is one of the significant challenges which is managed by coating with Al-Zn-based alloys. The Galvalume alloy (Al-55%, 43.5%-Zn, Si-1.5%) is coated on steel strips via a hot-dipping process. The dissolution of iron (Fe) from steel strips and the formation of Fe-based intermetallic particles is an inevitable phenomenon during the hot-dip coating process. These intermetallic particles are a primary source of massive bottom dross build-up in the coating pot and metal spot defects in the coated steel products. Therefore, it is important to investigate the formation of Fe-based intermetallic particles. In this study, Fe-based intermetallic particles are produced via the powder metallurgy route. High energy ball milling was used for mechanical alloying of aluminum (Al), iron (Fe), silicon (Si), and zinc (Zn) powders. Optimized ball milling conditions were identified after a series of trials. After cold pressing, the mechanically alloyed samples (pellets) were sintered at various conditions in a high vacuum sintering furnace. The X-ray diffraction (XRD) and scanning electron microscope (SEM) equipped with energy-dispersive X-ray diffraction (EDS) were used for the analysis of raw material, mechanically alloyed powders, and sintered pellets. It is concluded that the mechanical alloying of 6h and cold pressing at 9 tons for 30 min is sufficient to produce a dense compact material. It was found that Fe-based intermetallic particles were successfully fabricated which were α-AlFeSi. However, intermetallic particles similar to those found in the bottom dross of the coating pot are difficult to fabricate through the powder metallurgy route due to the volatilization of Zn during the sintering process.
© 2021 The Authors. Published by IASE.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Al-Zn alloy, AlFeSi, Mechanical alloying, Sintering
Article History: Received 27 April 2021, Received in revised form 21 July 2021, Accepted 24 September 2021
This research has been funded by Scientific Research Deanship at the University of Ha’il–Saudi Arabia through project number RG-191281.
Compliance with ethical standards
Conflict of interest: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Khaliq A, Chaudhry IA, and Boujelbene M et al. (2021). Iron-based intermetallic particles formation in Al-Zn-Si alloy through powder metallurgy route. International Journal of Advanced and Applied Sciences, 8(12): 36-42
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