High Temperature Performance of Spark Plasma Sintered W0.5(TaTiVCr)0.5 Alloy
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metals-10-01512.pdf
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3.49 MB
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78a6523ae75097f33fccc06b2bdffc17
Author(s)
Alvi, Sajid
Waseem, Owais Ahmed
Akhtar, Farid
Date Issued
November 2020
Journal
Metals
Publisher
MDPI AG
Citation
Alvi, Sajid et al. "High Temperature Performance of Spark Plasma Sintered W0.5(TaTiVCr)0.5 Alloy." Metals 10, 11 (November 2020): 1512 © 2020 The Authors
Version
Final published version
Abstract
The phase stability, compressive strength, and tribology of tungsten alloy containing low activation elements, W0.5(TaTiVCr)0.5, at elevated temperature up to 1400 °C were investigated. The spark plasma sintered W0.5(TaTiVCr)0.5 alloy showed body centered cubic (BCC) structure, which was stable up to 1400 °C using in-situ high temperature XRD analysis and did not show formation of secondary phases. The W0.5(TaTiVCr)0.5 alloy showed exceptionally high compressive yield strength of 1136 ± 40 MPa, 830 ± 60 MPa and 425 ± 15 MPa at 1000 °C, 1200 °C and 1400 °C, respectively. The high temperature tribology at 400 °C showed an average coefficient of friction (COF) and low wear rate of 0.55 and 1.37 × 10−5 mm3/Nm, respectively. The superior compressive strength and wear resistance properties were attributed to the solid solution strengthening of the alloy. The low activation composition, high phase stability, superior high temperature strength, and good wear resistance at 400 °C of W0.5(TaTiVCr)0.5 suggest its potential utilization in extreme applications such as plasma facing materials, rocket nozzles and industrial tooling.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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DOI of Published Version
https://doi.org/10.3390/met10111512
