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Investigating the Mechanical Properties and Pitting Potential of Heat-Treated AISI 4340 Steel in Various Corrosive Environments

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Manufacturing Engineering

Part of the book series: Lecture Notes on Multidisciplinary Industrial Engineering ((LNMUINEN))

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Abstract

The corrosion and electrochemical behavior of high-strength steel AISI 4340 with or without nitrocarburizing heat-treated conditions was studied using salt spray test under 5% NaCl for 24 hours. Electrochemical experiments were also carried out under corrosive environment of a 1N H2SO4. Without heat-treated results obtained by electrochemical test between potential and log of ampere, it yields the value of corrosion potential to 269.2 mV, and in case of heat-treated sample, value obtained is to be −431.918 mV. For heat-treated samples, the rate of corrosion (Icorr) shows a continuous shifting of graph toward a positive direction, whereas in case of without heat-treated sample, the rate of corrosion (Icorr) for HT sample is higher. In salt spray test, the more corrosion product was found to be deposited on surface of heat-treated specimen. Surface morphology of the salt spray specimen is observed under SEM and optical microscope. It reveals large numbers of corrosion pits, with heavily corroded surface. It was caused due to the decrement of the chromium content in high-strength steel with an increase of nitrocarburizing heat treatment temperature. It was observed that with an increase in heat treatment time, Vickers hardness values of 4340 steel increases from 310.8 to 468.2 HV due to increase of nitrogen (N) content over the compound layer.

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Authors and Affiliations

  1. Department of Industrial and Production Engineering, Dr B R Ambedkar National Institute of Technology Jalandhar, Jalandhar, 144011, India

    Shailendra Singh Bhadauria, Varun Sharma & Ajay Gupta

Authors
  1. Shailendra Singh Bhadauria
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  2. Varun Sharma
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  3. Ajay Gupta
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Corresponding author

Correspondence to Shailendra Singh Bhadauria .

Editor information

Editors and Affiliations

  1. School of Mechanical, Industrial and Aeronautical Engineering, University of Witwatersrand, Johannesburg, Gauteng, South Africa

    Vishal S. Sharma

  2. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

    Uday S. Dixit

  3. Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim, Norway

    Knut Sørby

  4. Department of Industrial and Production Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

    Arvind Bhardwaj

  5. Department of Industrial and Production Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

    Rajeev Trehan

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Bhadauria, S.S., Sharma, V., Gupta, A. (2020). Investigating the Mechanical Properties and Pitting Potential of Heat-Treated AISI 4340 Steel in Various Corrosive Environments. In: Sharma, V., Dixit, U., Sørby, K., Bhardwaj, A., Trehan, R. (eds) Manufacturing Engineering . Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-4619-8_26

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  • DOI: https://doi.org/10.1007/978-981-15-4619-8_26

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-15-4618-1

  • Online ISBN: 978-981-15-4619-8

  • eBook Packages: EngineeringEngineering (R0)

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