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Morphologies and Compositions of α–Al15Fe3Si2-Type Intermetallics in Al–Si–Fe–Mn–Cr Alloys

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Abstract

In this paper, several Al–Si–Fe–Mn–Cr alloys were prepared, with different element contents and solidification conditions. The conventional Chinese character-shaped Al15(Fe,Mn)3Si2 particles were detected in slowly solidified Al–12Si–2Fe–4Mn alloy, while both (Al,Si)2Cr and Al15(Fe,Cr)3Si2 particles were formed in slowly solidified Al–12Si–2Fe–4Cr alloy. When the melt was solidified with high cooling speed, all of the α–Al15Fe3Si2-type intermetallics in Al–12Si–2Fe–4Mn, Al–12Si–2Fe–4Cr and Al–12Si–4Fe–xMn–yCr (x + y = 4) alloys exhibit dendrite-like. It was found that the higher Mn (or Cr) addition in Al–12Si–4Fe–xMn–yCr alloys, the higher Mn (or Cr) content in Al15(Fe,Mn,Cr)3Si2 phase. Compared to Mn atoms, Cr atoms have a higher tendentiousness to participate in the formation of Al15(Fe,Mn,Cr)3Si2 intermetallics.

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Acknowledgment

This research was financially supported by the Young Scholars Program of Shandong University.

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Authors and Affiliations

  1. Qingte Group Co. Ltd, Qingdao, 266106, People’s Republic of China

    Benyou Liu, Changcheng Ma, Long Li, Chaohui Yang & Nan Yu

  2. Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan, 250061, People’s Republic of China

    Weimin Wang & Tong Gao

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  1. Benyou Liu
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  2. Changcheng Ma
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Correspondence to Tong Gao.

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Liu, B., Ma, C., Li, L. et al. Morphologies and Compositions of α–Al15Fe3Si2-Type Intermetallics in Al–Si–Fe–Mn–Cr Alloys. Inter Metalcast 17, 1156–1164 (2023). https://doi.org/10.1007/s40962-022-00843-4

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