Founding Research Journal

Founding Research Journal

Investigating the Microstructure, Mechanical and Thermal Properties of CuNiAlCrFe High Entropy Alloy Made by VAR Method

Document Type : Original Research Article

Authors
Haniyeh Nahavandi 1
Hamid Khorsand 2
1 M.Sc. Student, Department of Materials Engineering, K. N. Toosi University of Technology, Tehran, Iran
2 Associate Professor, Department of Materials Engineering, K. N. Toosi University of Technology, Tehran, Iran.
10.22034/frj.2024.465005.1196
Abstract
High entropy alloys (HEAs) have attracted much attention due to their unique properties, which include high mechanical strength, corrosion resistance, and stability at high temperatures. Among the production methods of high entropy alloys, the vacuum remelting casting method (VAR) is of great importance due to the control of the melting process and rapid solidification of the melt. The aim of this research is to make a microstructure with uniform chemical composition of high entropy CuNiAlCrFe alloy with suitable mechanical and thermal properties using VAR casting method. After preparing CuNiAlCrFe high entropy alloy ingot by VAR casting method, XRD, EDX analyzes and also Map images of the alloy composition were prepared to verify the made alloy. The light microscope images showed the dendritic structure of the alloy due to rapid freezing and confirmed the biphasic nature of the high entropy alloy. Next, in order to characterize the physical properties of the high entropy alloy, DSC and TG thermal analysis were taken. The results of thermal analysis showed that the melting point of the high entropy CuNiAlCrFe alloy is 1360 oC, and no mass change was observed during the process up to the above temperature. During the process of studying the above-mentioned high entropy alloy, samples were taken to check mechanical tests such as tensile, average hardness and microhardness, and the results obtained were final strength 3000 MPa, HV30577, (rich in iron phase) HV30 160 and ( copper rich phase) were 125 HV30
Keywords
High entropy CuNiAlCrFe alloy
Fast solidification
Microstructure
Mechanical properties
Subjects
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Founding Research Journal
Volume 8, Issue 2 - Serial Number 25
Autumn and Winter
Autumn 2024
Pages 107-115

  • Receive Date 27 June 2024
  • Revise Date 17 August 2024
  • Accept Date 25 August 2024