Effect of Cobalt Content on Thermal, Mechanical, and Microstructural Properties of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) High-Entropy Alloys

  • Saurav Kumar
  • Amar PatnaikEmail author
  • Ajaya Kumar Pradhan
  • Vinod KumarEmail author


Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys are developed by arc melting route to investigate the effect of cobalt content on thermal, mechanical, and microstructural properties. The phase, microstructure, and chemical composition are analyzed using x-ray diffraction, transmission electron microscope, and scanning electron microscope with attached energy-dispersive x-ray spectrometer. The obtained results have shown that the Al0.4FeCrNiCox (x = 0-0.5 mol) high-entropy alloys form a simple FCC + BCC-type solid solution and Al0.4FeCrNiCox=1 HEA forms a single-phase FCC structure. The compressive yield strength, microhardness, and thermal conductivity are observed to decrease from 965.22 to 233.37 MPa, 253.6 to 155.6 HV, and from 4.87 to 2.674 W/mK, respectively, whereas the electrical resistivity is observed to increase from 150.30 to 273.74 µΩ-cm with the addition of cobalt from x = 0-1 mol. Differential scanning calorimetry analysis has indicated that the Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high-entropy alloys are thermally stable up to 1000 °C.


DSC hardness high-entropy alloy thermal conductivity 



Authors are thankful to the Institute (Malaviya National Institute of Technology, Jaipur) for financial support, Material Research Center, MNIT Jaipur, and ACMS, IIT Kanpur, for providing experimental facilities and Prof. Anandh Subramaniam (IIT Kanpur) for providing arc melting facility.


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Copyright information

© ASM International 2019

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials EngineeringMNITJaipurIndia
  2. 2.Department of Mechanical EngineeringMNITJaipurIndia
  3. 3.Discipline of Metallurgy Engineering and Materials ScienceIIT IndoreIndoreIndia

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