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High Temperature Performance of Spark Plasma Sintered W0.5(TaTiVCr)0.5 Alloy
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-3735-2133
Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4888-6237
2020 (English)In: Metals, ISSN 2075-4701, Vol. 10, no 11, article id 1512Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
MDPI, 2020. Vol. 10, no 11, article id 1512
Keywords [en]
high-entropy alloy, W-heavy alloy, high-entropy composite, high temperature compression, high temperature tribology, thermal stability
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-82155DOI: 10.3390/met10111512ISI: 000593291900001Scopus ID: 2-s2.0-85097521286OAI: oai:DiVA.org:ltu-82155DiVA, id: diva2:1514105
Funder
Swedish Foundation for Strategic Research , RIF14–0083The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), IB2019-8546
Note

Godkänd;2021;Nivå 0;2021-01-04 (alebob)

Available from: 2021-01-04 Created: 2021-01-04 Last updated: 2021-06-09Bibliographically approved

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Alvi, SajidAkhtar, Farid

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