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Room temperature wear study of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys under oil lubricating conditions

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  • Nanocrystalline High Entropy Materials: Processing Challenges and Properties
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Abstract

This study aims to investigate the sliding wear behavior of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys (HEAs) under oil lubricating conditions at room temperature. Phase and microstructural characterizations of HEAs are performed by utilizing X-ray photoelectron spectroscopy (XRD) and scanning electron microscope (SEM). The compressive yield strength of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) HEAs is observed to decrease from 1169.35 to 257.63 MPa. Plastic deformation up to 75% is achieved in the case of Al0.4FeCrNiCox =1 HEA. The microhardness of HEA samples is found to decrease from 377 to 199 HV after the addition of cobalt content from x = 0 to 1.0 mol. Thermal analysis is performed using a differential scanning calorimeter. It is confirmed that Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) HEAs do not undergo any phase change up to 1000 °C. The specific wear rate of Al0.4FeCrNiCox =1 HEA is observed to be highest in all wear conditions. The worn surfaces were analyzed by SEM with attached energy-dispersive spectroscopy, 3D profiling, and X-ray photoelectron spectroscopy (XPS).

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Acknowledgments

Authors are thankful to the institute grants for financial support, Advanced Tribology Research Lab for tribology test, and Department of Mechanical Engineering MNIT Jaipur, Material Research Centre, MNIT Jaipur, for carrying out the experimental work. VK also thanks BRNS Project No. 34/20/01/2014-BRNS-0339, Mumbai (India), for financial assistance.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, MNIT, Jaipur, 302017, India

    Saurav Kumar & Ajaya Kumar Pradhan

  2. Department of Mechanical Engineering, MNIT, Jaipur, 302017, India

    Amar Patnaik

  3. Discipline of Metallurgy Engineering and Materials Science, IIT, Indore, 453552, India

    Vinod Kumar

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  1. Saurav Kumar
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  2. Amar Patnaik
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Correspondence to Amar Patnaik or Vinod Kumar.

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Kumar, S., Patnaik, A., Pradhan, A.K. et al. Room temperature wear study of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys under oil lubricating conditions. Journal of Materials Research 34, 841–853 (2019). https://doi.org/10.1557/jmr.2018.499

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