Effects of Alloying Elements and Mechanical Alloying on Characteristics of WVTaTiCr Refractory High-Entropy Alloys

Refractory high-entropy alloys (RHEAs) are among the promising candidates for the design of structural materials in advanced nuclear energy systems. The effects of Cr, V, Ta, and Ti elements and ball milling on the microstructural evolution and mechanical properties of model RHEAs were investigated....

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Bibliographic Details
Published in:Materials 2023-09, Vol.16 (18), p.6194
Main Authors: Chen, Chun-Liang, Lin, Jyun-Hong
Format: Article
Language:English
Subjects:
Alloying effects
Alloying elements
Alloys
Ball milling
Building materials
Chromium
Dispersion strengthening
High entropy alloys
High temperature
Laves phase
Mechanical alloying
Mechanical properties
Nuclear energy
Nuclear facilities
Nuclear reactor components
Nuclear reactors
Particle size
Powder metallurgy
Radiation
Solid solutions
Specialty metals industry
Temperature
Titanium
Vanadium
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Summary:Refractory high-entropy alloys (RHEAs) are among the promising candidates for the design of structural materials in advanced nuclear energy systems. The effects of Cr, V, Ta, and Ti elements and ball milling on the microstructural evolution and mechanical properties of model RHEAs were investigated. The results show that W-rich BCC1 and Ta-rich BCC2 solid solution phases were generated after a long milling duration. After high-temperature sintering, the (Cr, Ta)-rich phase associated with the Laves phase was observed in the Cr-containing model RHEAs. In addition, a high level of Ti, Ta, and V contents promoted the in situ formation of oxide particles in the alloys. Complex TiTa2O7 and Ta2VO6 oxide phases were identified by TEM, which suggests a solid-state reaction of Ti-O, Ta-O, and V-O subjected to high-energy ball milling. The oxide particles are uniformly dispersed in the BCC matrix, which can result in dispersion strengthening and the enhancement of mechanical properties.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16186194