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Electrochemical Corrosion Behavior of Heat Treated Inconel 718 Superalloy Manufactured by Direct Metal Laser Sintering (DMLS) in 3.5% NaCl Solution

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Innovations in Additive Manufacturing

Part of the book series: Springer Tracts in Additive Manufacturing ((STAM))

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Abstract

Additive Manufacturing enables the design of element with complicated geometrics which can be fabricated with less time when compared with traditional manufacturing. The complex geometries of high performance materials can be easily fabricated through additive manufacturing technologies will be the main focus in industries. Nickel based superalloy are specifically compelling due to their extraordinary mechanical strength, wear and known for its oxidation and corrosion resistance at both ambience and higher temperatures. The outcomes of heat treatment of additively manufactured DMLS alloy and commercial alloy is studied. The DMLS and commercial IN718 were solutionized at 980 and 1100 ˚C followed by double ageing at 620 and 720 ˚C for 8 h and 845 ˚C at 24 h respectively. The microstructures and X-ray diffraction pattern of the DMLS and commercial alloy were investigated with the optical microscope and X-ray diffractometer. The strengthening phase such as γ’ and γ” intention is very low for the commercial alloy. It was also found that, HT 1 (980 ˚C) DMLS alloy have good tensile load. The impact strength of the DMLS alloy is decreased after the heat treatment and this is due to the brittleness of the heat treated alloy. The electrochemical corrosion at 3.5% NaCl solution was carried out for DMLS and commercial alloy. The corrosion potential difference in the DMLS and commercial alloy is the key factor for galvanic corrosion. The corrosion resistance of the DMLS alloy is very high when evaluated to commercial alloy and it was found that, the HT 2 DMLS alloy have the high corrosion resistance.

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Authors and Affiliations

  1. Department of Mechanical Engineering and Centre for Surface Engineering, Kalasalingam Academy of Research and Education, Virudhunagar, Tamilnadu, India

    B. Anushraj, D. Chella Ganesh & A. Ajithram

  2. Department of Computer Science and Engineering, Kalasalingam Academy of Research and Education, Virudhunagar, Tamilnadu, India

    N. C. Brintha

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  1. B. Anushraj
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Editors and Affiliations

  1. School of Automotive and Mechanical Engineering, Kalasalingam Academy of Research and Education, Virudhunagar, India

    M. Adam Khan

  2. School of Automotive and Mechanical Engineering, Kalasalingam Academy of Research and Education, Virudhunagar, India

    J. T. Winowlin Jappes

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Anushraj, B., Brintha, N.C., Chella Ganesh, D., Ajithram, A. (2022). Electrochemical Corrosion Behavior of Heat Treated Inconel 718 Superalloy Manufactured by Direct Metal Laser Sintering (DMLS) in 3.5% NaCl Solution. In: Khan, M.A., Jappes, J.T.W. (eds) Innovations in Additive Manufacturing. Springer Tracts in Additive Manufacturing. Springer, Cham. https://doi.org/10.1007/978-3-030-89401-6_12

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  • DOI: https://doi.org/10.1007/978-3-030-89401-6_12

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