Sliding Friction and Wear Behavior of High Entropy Alloys at Room and Elevated Temperatures Page: 2
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1.2 Motivation
There has been plenty of research on HEAs. However, most studies have focused
upon the mechanical, electronic, and magnetic properties of HEAs. In addition, there are
even fewer studies on the tribological (friction and wear) properties of HEAs. To date,
only the tribological behavior at room temperature has been studied during sliding.
However, the wear and friction behavior at elevated temperatures has not been studied
in sliding or rolling contacts. Therefore, in the present work an attempt has been made to
study the sliding friction and wear properties of the Al-containing HEAs at elevated
temperatures of 1000C and 3000C. The major aim of this study is to better understand
what the role of HEA microstructure is on the wear and friction behavior at ambient and
elevated temperatures under dry sliding conditions, and compare it to current existing
alloys such as bearing steels, 440C stainless steel and 52100 CrC-reinforced steel.
1.3 Objectives
The following points summarize the objectives of this study:
1. Determining the microstructure morphologies and crystal structures of the HEAs
via Scanning Electron Microscopy and X-ray Diffraction.
2. Studying the tribological properties of HEAs at room and elevated temperatures.
3. Studying the mechanical properties of HEAs, such as hardness, and how it can
affect the wear behavior of HEAs.
4. Analyzing the surface of the wear tracks to better understand the sliding wear
mechanisms.2
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Kadhim, Dheyaa. Sliding Friction and Wear Behavior of High Entropy Alloys at Room and Elevated Temperatures, thesis, December 2016; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc955078/m1/16/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .