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Characterization of Interfacial Microstructure in Friction Welds Between Inconel 718 and SM45C Steel

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Abstract

The dissimilar joint of Inconel 718 to SM45C steel was joined by friction welding. The joint interface microstructure, strain hardening effect and fracture morphology were characterized by scanning electron microscope and electron backscattered diffraction and electron probe microscopy analysis. Tensile, fatigue tests and microhardness measurements evaluated for the mechanical properties of the joints. The highest hardness was recorded on the Inconel 718 side near to the weld interface. The weld interface revealed several widths of the intermixing zone of SM45C and Inconel 718. The width of the intermixed zone varied from the center to periphery of the joint, while the strain hardening effect on the SM45C side formed with the fine-grained structure. The fracture morphology of the tensile fractured joints investigated the mixed mode of ductile and brittle nature failure.

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Acknowledgments

This research was supported by Kyungsung University research grants in 2020.

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Authors and Affiliations

  1. Department of Mechatronics Engineering, Kyungsung University, Busan, 48434, Republic of Korea

    Muralimohan Cheepu & Woo Seong Che

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  1. Muralimohan Cheepu
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  2. Woo Seong Che
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Correspondence to Woo Seong Che.

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Cheepu, M., Che, W.S. Characterization of Interfacial Microstructure in Friction Welds Between Inconel 718 and SM45C Steel. Trans Indian Inst Met 73, 1567–1571 (2020). https://doi.org/10.1007/s12666-020-01921-z

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  • DOI: https://doi.org/10.1007/s12666-020-01921-z

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