Remelting of Aluminum Scrap Into Billets Using Direct Chill Casting

Rajagukguk, Kardo and Suyitno, Suyitno and Saptoadi, Harwin and Kusumaningtyas, Indraswari and Arifvianto, Budi and Mahardika, Muslim (2024) Remelting of Aluminum Scrap Into Billets Using Direct Chill Casting. Archives of Foundry Engineering, 24 (1). 40 -49. ISSN 18973310

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Abstract

An as-cast aluminum billet with a diameter of 100 mm has been successfully prepared from aluminum scrap by using direct chill (DC) casting method. This study aims to investigate the microstructure and mechanical properties of such as-cast billets. Four locations along a cross-section of the as-cast billet radius were evaluated. The results show that the structures of the as-cast billet are a thin layer of coarse columnar grains at the solidified shell, feathery grains at the half radius of the billet, and coarse equiaxed grains at the billet center. The grain size tends to decrease from the center to the surface of the as-cast billet. The ultimate tensile strength (UTS) and the hardness values obtained from this research slightly increase from the center to the surface of the as-cast billet. The distribution of Mg, Fe, and Si elements over the cross-section of the as-cast billet is inhomogeneous. The segregation analysis shows that Si has negative segregation towards the surface, positive segregation at the middle, and negative segregation at the center of the as-cast billet. On the other hand, the Mg element is distributed uniformly in small quantities in the cross-section of the as-cast billet. © The Author(s) 2024. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

Item Type: Article
Additional Information: Cited by: 0
Uncontrolled Keywords: Billets (metal bars); Scrap metal reprocessing; Segregation (metallography); Textures; Aluminium scraps; As-cast; Cast aluminium; Cast aluminum; Cast billets; Casting method; Direct chill casting; Macrosegregations; Negative segregations; Recycling aluminum scrap; Tensile strength
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering > Mechanical and Industrial Engineering Department
Depositing User: Rita Yulianti Yulianti
Date Deposited: 12 Feb 2025 01:04
Last Modified: 12 Feb 2025 01:04
URI: https://ir.lib.ugm.ac.id/id/eprint/13698

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