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Characterization of Al–Fe–V–Si heat-resistant aluminum alloy components fabricated by selective laser melting

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Abstract

Heat-resistant Al–8.5Fe–1.3V–1.7Si (wt%) aluminum alloy components were fabricated using selective laser melting (SLM). The as-built samples were examined in terms of density, chemical composition, surface morphologies, microstructures, and mechanical behavior. The results show that nearly full dense samples with the relative density of 99.3% can be produced. The chemical composition of the deposited material is close to that of the powder, presenting a limited aluminum loss and a low oxygen pickup. The SLM specimens consist of three typical zones: the fusion zone (FZ), the remelting border zone (RBZ), and the heat-affected zone (HAZ). Ultrafine continuous cellular α-Al networks are observed in the FZ. The HAZ exhibits fine rounded Al12(Fe,V)3Si particles (10–70 nm) distributed homogeneously in the α-Al matrix, while the rectangle-like AlmFe-type phase (m = 4.0–4.4) with 100–500 nm in size is preferably formed in the RBZ. The microhardness of the parts shows directional independent, with a mean value of 246 HV0.1.

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ACKNOWLEDGMENT

The authors gratefully acknowledge the financial support by the National High-Tech Program (863) of PR China (Project no. 21100002013101006).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, People’s Republic of China

    Shaobo Sun, Lijing Zheng & Yingying Liu

  2. Modern Manufacturing Engineering Center, Heilongjiang Institute of Science and Technology, Harbin, 150027, People’s Republic of China

    Jinhui Liu

  3. School of Materials Science and Engineering, Beihang University, Beijing, 100191, People’s Republic of China

    Hu Zhang

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  1. Shaobo Sun
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  2. Lijing Zheng
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  3. Yingying Liu
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  4. Jinhui Liu
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Correspondence to Lijing Zheng.

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Contributing Editor: Jürgen Eckert

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Sun, S., Zheng, L., Liu, Y. et al. Characterization of Al–Fe–V–Si heat-resistant aluminum alloy components fabricated by selective laser melting. Journal of Materials Research 30, 1661–1669 (2015). https://doi.org/10.1557/jmr.2015.110

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