Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing

Andreoli AF, Mendes RG, Witusiewicz VT, Shuleshova O, Van Huis MA, Nielsch K, Kaban I (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Acta Materialia Elsevier

Book Volume: 221

Article Number: 117416

DOI: 10.1016/j.actamat.2021.117416

Abstract

Time- and temperature-resolved phase formation in the equiatomic NbTiVZr refractory high-entropy alloy has been studied in situ using high-energy synchrotron X-ray diffraction and high-speed video imaging during non-equilibrium solidification. Phase formation is shown to be dependent on the solidification conditions. When the melt is undercooled over 80 K it crystallizes as a bcc single-phase solid solution despite solute partitioning between dendrites and interdendritic regions. When the sample is for some time kept in the semisolid state, two additional bcc phases form in the interdendritic regions. The crystal growth velocity for the NbTiVZr alloy, as estimated from the high-speed videos, shows pronounced sluggish kinetics.

Involved external institutions

Universiteit Utrecht (UU) / Utrecht University NL Netherlands (NL) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Access e.V. DE Germany (DE)

How to cite

APA:

Andreoli, A.F., Mendes, R.G., Witusiewicz, V.T., Shuleshova, O., Van Huis, M.A., Nielsch, K., & Kaban, I. (2021). Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing. Acta Materialia, 221. https://doi.org/10.1016/j.actamat.2021.117416

MLA:

Andreoli, Angelo F., et al. "Phase constitution and microstructure of the NbTiVZr refractory high-entropy alloy solidified upon different processing." Acta Materialia 221 (2021).

BibTeX: Download