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Slurry Erosion Studies on Surface Modified 13Cr-4Ni Steels: Effect of Angle of Impingement and Particle Size

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Abstract

Hydroturbine steels, such as 13Cr-4Ni martensitic steels, are generally subjected to heavy-erosive wear and loss of efficiency due to solid particulate entrainment in the water. Surface-modified steels have proven to give better performance in terms of erosive wear resistance. In the present study, an attempt is made to investigate the effect of angle of impingement and particle size on slurry-jet erosion behavior of pulsed plasma nitrided and laser hardened 13Cr-4Ni steels. Laser hardening process has shown good performance at all angles of impingement due to martensitic transformation of retained austenite. Plastic deformation mode of material removal was also an evident feature of all laser-hardened surface damage locations. However, pulsed-plasma nitrided steels have exhibited chip formation and micro-cutting mode of erosive wear. Erosion with 150-300 μm size was twice compared to 150 μm size slurry particulates.

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Acknowledgments

We wish to thank Dr. B.S. Mann, Additional director, Surface Coatings and Treatment Laboratory, Corporate R&D Division, BHEL, Vikasnagar, Hyderabad, India for his help in providing the material for this investigation. We also thank ARCI, Hyderabad for their assistance in Laser treatment of our Cr-Ni alloys. The authors are grateful to Department of Science and Technology (DST), India for their financial assistance.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Madras, Chennai, Tamil Nadu, 600 036, India

    T. Manisekaran & M. Kamaraj

  2. Centre for Laser Processing of Materials, International Advanced Research Centre for Powder Metallurgy and Newer Materials (ARCI), Hyderabad, AP, 500005, India

    S.M. Sharrif & S.V. Joshi

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  1. T. Manisekaran
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  2. M. Kamaraj
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  3. S.M. Sharrif
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  4. S.V. Joshi
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Correspondence to M. Kamaraj.

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Manisekaran, T., Kamaraj, M., Sharrif, S. et al. Slurry Erosion Studies on Surface Modified 13Cr-4Ni Steels: Effect of Angle of Impingement and Particle Size. J. of Materi Eng and Perform 16, 567–572 (2007). https://doi.org/10.1007/s11665-007-9068-5

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  • DOI: https://doi.org/10.1007/s11665-007-9068-5

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