AN INVESTIGATION ON MICROSTRUCTURES, MECHANICAL AND WEAR BEHAVIOR OF LASER-CLADDED INCONEL 625 AND NIMONIC 90 OVER NIMONIC 90 SUBSTRATE

T. Prabakaran (), D. Raj Kumar, K. Vijayan (), K. Madhan Muthu Ganesh () and P. Thamizhvalavan ()
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T. Prabakaran: Department of Mechanical Engineering, Meenakshi Sundararajan Engineering College, Kodambakkam, Chennai 600024, Tamil Nadu, India
D. Raj Kumar: ��Department of Mechanical Engineering, MAM School of Engineering, Trichy 620216, Tamil Nadu, India
K. Vijayan: ��Department of Mechanical Engineering, MAM School of Engineering, Trichy 620216, Tamil Nadu, India
K. Madhan Muthu Ganesh: ��Department of Mechanical Engineering, MAM School of Engineering, Trichy 620216, Tamil Nadu, India
P. Thamizhvalavan: ��Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 602105, Tamil Nadu, India

Surface Review and Letters (SRL), 2024, vol. 31, issue 05, 1-12

Abstract: The wrought nickel–chromium–cobalt Nimonic 90 alloy is widely used in turbine blades, piston rings and forged tools due to their high stress-rupture strength and creep resistance up to 920∘C. The application components showed unavoidable wear behaviors at high loads due to the reduced resistance of the components. Hence, in order to increase the wear resistance of this alloy, Inconel 625 and Nimonic 90 particle depositions have been carried out on Nimonic 90 substrate through the laser-cladding techniques to study the microstructure, mechanical and tribological behaviors of alloys. The phases, microstructure and microhardness of the claddings were investigated by X-ray diffractometry (XRD), Transmission electron microscopy (TEM), Scanning electron microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS) and hardness test, respectively. Results showed that the mean thickness of the interfacial layer of Inconel 625 and Nimonic 90 was 18.51 ± 4 μm and 90.68 ± 7 μm, respectively. The microstructure of the cladding surfaces resulted in dendritic and interdendritic structures. An overall analysis found that the gamma-Ni and hard laves phases were presented in Inconel 625 and Nimonic 90 clad surfaces, respectively. Nimonic 90 clad surface had a high hardness and wear resistance compared with Inconel 625 clad surface and substrate due to the present hard laves phase. Besides, the roughness of the Nimonic 90 clad surface was lower compared with the Inconel 625 clad surface and substrate.

Keywords: Nimonic 90; Inconel 625; laser cladding; wear mechanism and roughness (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0218625X24500380

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