HIGH-TEMPERATURE DRY SLIDING WEAR BEHAVIOR OF COLD-SPRAYED INCONEL 738 COATING

B. V. Padmini, Digvijay G. Bhosale, H. B. Niranjan, Mahantayya Mathapati and P. Sampathkumaran
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B. V. Padmini: Department of Mechanical Engineering, Sambhram Institute of Technology, Bengaluru 560097, Karnataka, India
Digvijay G. Bhosale: ��Department of Mechanical Engineering, Dr. D. Y. Patil Institute of Technology, Pune 411018, Maharashtra, India
H. B. Niranjan: Department of Mechanical Engineering, Sambhram Institute of Technology, Bengaluru 560097, Karnataka, India
Mahantayya Mathapati: ��Department of Mechanical Engineering, KLE College of Engineering and Technology, Chikodi 591201, Karnataka, India
P. Sampathkumaran: Department of Mechanical Engineering, Sambhram Institute of Technology, Bengaluru 560097, Karnataka, India

Surface Review and Letters (SRL), 2023, vol. 30, issue 02, 1-11

Abstract: This paper deals with the dry sliding wear behavior of cold-sprayed Inconel 738 (IN 738) coating up to 600∘ C. The coating was deposited by a high-pressure cold spray system using helium as the propellant on T11 low-carbon steel substrate. The dry sliding wear behavior of uncoated specimens is compared with IN 738 coating using pin-on-disk tribometer (ASTM G99). SEM, EDX, and XRD analyses provide better insights on the worn surface morphology, changes in oxide scales, and phase transformation. At 400∘C, the tribo-layer developed at the interface contains NiO, which is a lubricious oxide, which reduces the wear rate of the coating. With further increase in temperature up to 600∘C, there is a formation of a protective layer, which results in the enhancement of high-temperature dry sliding wear resistance of the coating. At 600∘C, sliding wear resistance offered by the coating is approximately four times higher than T11 low-carbon steel. Therefore, the developed cold-sprayed IN 738 has high potential for usage at elevated-temperature dry sliding applications.

Keywords: Dry sliding; cold spray coatings; Inconel 738; high-temperature wear (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0218625X23500063

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