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A study of microstructure and phase constitutions of the Cr–Ni surfacing layers deposited on Fe3Al intermetallic by SMAW

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Abstract

Three different Cr–Ni alloys were deposited on the surface of Fe3Al intermetallic by shielded metal arc welding (SMAW) to investigate the weldability of this material. The microstructure, phase constitutions, and fine structures of Cr–Ni surfacing layers were analyzed via metalloscope, SEM, XRD, and TEM. The results indicated that the Fe3Al/Cr–Ni joint shows no cracks when Cr25–Ni13 alloy was deposited. The surfacing layer consisted of austenite (A), pro-eutectoid ferrite (PF), carbide-free bainite (CFB), lath martensite (LM), and little acicular ferrite (AF). Phase constitutions of the joint included Fe3Al, FeAl, γ-(Fe,C), γ-(Fe,Ni), NiAl, and Ni3Al. The lattice orientation for CFB between α and γ phases was (110)α//(111)γ. Typical LM was composed of interlayer-carbide and α ferrite of 400 nm in length and 40 nm in width.

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Acknowledgements

This project was sponsored by the National Natural Science Foundation of China (50375088) and Doctoral Foundation of Shandong Province (2006BS04004) and Development project of Science and Technology of Shandong Province (2007GG10004016).

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Authors and Affiliations

  1. Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University (South Campus), Jing Shi Road 73, Jinan, 250061, Shandong, P.R. China

    Haijun Ma, Yajiang Li & Juan Wang

  2. Material Science Department, Bauman Moscow State Technical University, Moscow, 105005, Russia

    Yajiang Li & S. A. Gerasimov

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  1. Haijun Ma
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  2. Yajiang Li
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  3. S. A. Gerasimov
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  4. Juan Wang
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Correspondence to Haijun Ma.

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Ma, H., Li, Y., Gerasimov, S.A. et al. A study of microstructure and phase constitutions of the Cr–Ni surfacing layers deposited on Fe3Al intermetallic by SMAW. J Mater Sci 43, 1480–1485 (2008). https://doi.org/10.1007/s10853-007-2331-1

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  • DOI: https://doi.org/10.1007/s10853-007-2331-1

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