Structural and morphological evolution of Fe–rich phases in Al–xMg–6Si–4Fe alloys

Tong Gao; Yihan Bian; Kaiqi Hu; Kai Zhao; Weibin Zhang; Xiangfa Liu

Results in Materials (Oct 2019)

Structural and morphological evolution of Fe–rich phases in Al–xMg–6Si–4Fe alloys

Tong Gao,
Yihan Bian,
Kaiqi Hu,
Kai Zhao,
Weibin Zhang,
Xiangfa Liu

Affiliations

Tong Gao: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China
Yihan Bian: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China
Kaiqi Hu: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China
Kai Zhao: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China
Weibin Zhang: Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China
Xiangfa Liu: Corresponding author.; Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, PR China

Journal volume & issue: Vol. 3
p. 100036

Abstract

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In this paper, the influence of Mg content on the evolution of Fe–rich phases in Al– xMg–6Si–4Fe alloys has been investigated. It was found that the Fe–rich phase in Mg–free Al–6Si–4Fe alloy is α–AlFeSi with the chemical formula of Al15Fe3Si2, performing as polyhedral morphology. When the addition of Mg is 2 wt% and 4 wt%, part of α–AlFeSi particles evolve to flake–like Al13Fe4 phase. With further increase of Mg content to 6 wt% and 10 wt%, the morphological evolution of Al13Fe4 from flake–like to petal–like with ten branches was detected. The evolution mechanisms were supposed relating to the combination tendency between Mg and Si atoms and the enhanced undercooling level caused by Mg addition.

Published in Results in Materials

ISSN: 2590-048X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/results-in-materials

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