Effect of Sc on growth behavior of interface compounds of Al/Fe layered composites

doi:10.13251/j.issn.0254-6051.2024.01.012

Abstract

Abstract: Effect of Sc element on the growth, type and micromorphology of intermetallic compounds at the Al/Fe composite interface was studied by means of SEM, EDS and other methods. The results show that the cold-rolled composite Al/Fe composite plates produce continuous interfacial compounds after annealing at 475-640 ℃ for 1 h, and the change trend of intermetallic compound thickness at 560 ℃and below is basically the same, but above 560 ℃, the growth trend of intermetallic compounds at the interface of Sc-containing composite plates slows down significantly, and the thickness is greatly reduced. This indicates that the addition of Sc elements on the Al side does not completely inhibit the production of intermetallic compounds at the interface. At the same time, the addition of Sc elements does not change the type and distribution of interface compounds, which are FeAl₃, Fe₂Al₅ and FeAl from Al side to Fe side. The Fe₂Al₅ phase at Fe side is finely jagged when annealed at 475 ℃, but the whole morphology is very flat, however, it becomes coarse finger-like morphology and uneven when annealed at 580 ℃.

Key words: Al/Fe composite, microalloying, intermetallic compounds

CLC Number:

TG146.2⁺1

Wang Zhen, Gao Kunyuan, Zhang Xiaojun, Nie Zuoren, Huang Hui, Wu Xiaolan. Effect of Sc on growth behavior of interface compounds of Al/Fe layered composites[J]. Heat Treatment of Metals, 2024, 49(1): 84-90.

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