Effect of Al on the microstructure, mechanical properties, and wear resistance of TiVZrNbAlx alloys

In this study, the microstructure, mechanical, and tribological properties of (Ti 42 V 28 Zr 15 Nb 15 ) 100-x Al x lightweight refractory high-entropy alloys (LRHEAs) were systematically investigated. The results show that the single BCC solid solution structure of LHEAs is maintained after the addi...

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Bibliographic Details
Published in:Journal of materials science 2024-07, Vol.59 (28), p.13218-13233
Main Authors: Liang, Chaojie, Deng, Yunlai, Xie, Yuankang, Wang, Chenglei
Format: Article
Language:English
Subjects:
Alloying elements
Alloys
Aluminum
Bonding strength
Characterization and Evaluation of Materials
Chemical bonds
Chemistry and Materials Science
Classical Mechanics
Coefficient of friction
Crystallography and Scattering Methods
Entropy
Friction
Hardness
High entropy alloys
Load
Materials Science
Mechanical properties
Metals & Corrosion
Microstructure
Oxidation
Polymer Sciences
Software
Solid Mechanics
Solid solutions
Temperature
Tensile properties
Tribology
Wear rate
Wear resistance
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Summary:In this study, the microstructure, mechanical, and tribological properties of (Ti 42 V 28 Zr 15 Nb 15 ) 100-x Al x lightweight refractory high-entropy alloys (LRHEAs) were systematically investigated. The results show that the single BCC solid solution structure of LHEAs is maintained after the addition of Al elements, and no other phases are formed. The addition of Al elements to the alloys can be reduce density, improve properties, and enhance wear resistance. While the hardness of the alloy increased from about ~ 352 HV to ~ 430 HV, the tensile ductility decreased significantly. The main reason for the increase in hardness is the strong bonding between aluminum atoms and other atoms. On the other hand, the severe impairment of the tensile properties may be due to the decrease in GNDs. Although the addition of Al helps to reduce the coefficient of friction, the wear rate of the alloy increases.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-024-09958-x