Microstructure and wear resistance of laser cladded Inconel 625 and Colmonoy 6 depositions on Inconel 625 substrate
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Microstructure and wear resistance of laser cladded Inconel 625 and Colmonoy 6 depositions on Inconel 625 substrate N. Jeyaprakash1 · Che‑Hua Yang1,2 · K. R. Ramkumar3 Received: 4 November 2019 / Accepted: 15 May 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Nickel-based alloy Inconel 625 is used in higher mechanical stress applications because of their superior oxidation and creep resistance. However, their undesirable tribological behaviour is the major technical issues in several applications. This research carried out the comparative investigation of Inconel 625 (IN625) and Colmonoy 6 deposition over IN625 substrate by laser cladding technique. The metallurgical, mechanical and tribological properties were investigated. Results showed that the presence of hard laves and γ-Ni phases were observed on Colmonoy 6 and IN625 clad surface, respectively. Besides, Colmonoy 6 clad contains more than 60% of the hard laves phase which has capable of providing higher hardness and wear resistance. The hard laves phase and higher hardness in Colmonoy 6 clad provided a strong network to enhance the wear resistance and reduced the roughness average compared to IN625 clad and base material. The Colmonoy 6 clad was the promising one for the sliding components to resist the sliding wear. Keywords IN625 · Colmonoy 6 · Laser cladding · Microstructure · Wear mechanism · Adhesive · Delamination · Roughness
1 Introduction An advanced technique like laser cladding uses for the development of protective layers over the substrate either cladding the same substrate material or different material [1]. Owing to the irradiation of a high-power laser beam, the deposited powder particles bonded firmly fused with base metal [2]. However, the other surface modification techniques such as tungsten inert gas (TIG), electron beam and thermal spray were used to improve the surface properties [3]. * N. Jeyaprakash [email protected]; [email protected] Che‑Hua Yang [email protected] K. R. Ramkumar [email protected] 1
Centre of Mass Customization Additive Manufacture, National Taipei University of Technology, Taipei 10608, Taiwan, ROC
2
Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan, ROC
3
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India
Based on the previous observation, the conventional-based TIG process produces crack due to induced residual stress [4]; electron-based surface modification are expensive and needs higher initial investment; thermal spray-based coating process shows lesser bond strength which is unfit for wear resistance application [5]. There are some metals or alloys that undergoes failure in service condition due to long run usage. Therefore, it is necessary to forecast the failure in advance otherwise the material removal may increase the possibility for catastrophic consequences. It is a prerequisite to improve the wear resistance of dynamic parts to evade materi
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