Analysis of the Influence of Alloying Elements and Annealing Temperature on the Microstructure of Zr–Nb–Sn Alloys and Mechanical Properties during Deformations
V. O. Kharchenko$^{1,2}$, D. O. Kharchenko$^{1}$, O. M. Shchokotova$^{1}$, O. B. Lysenko$^{1}$, S. V. Kokhan$^{1}$, D. V. Leykykh$^{1}$, A. V. Dvornychenko$^{2}$
$^{1}$Institute of Applied Physics, NAS of Ukraine, 58 Petropavlivska Str., 40000 Sumy, Ukraine
$^{2}$Sumy State University, 116 Kharkivs’ka Str., UA-40007 Sumy, Ukraine
Received: 21.02.2025; final version - 02.07.2025. Download: PDF
We study the dynamics of microstructural transformations and the evolution of vacancies’ ensemble during the heat treatment of Zr–Nb–Sn alloys with a low concentration of alloying elements by the phase-field modelling. An influence of alloying elements and annealing temperature on the kinetic and statistical properties of the evolution of the microstructure, defect structure, and mechanical properties of the alloys is examined. As found, during heat treatment, niobium-enriched β-phase precipitates emerge, while tin and equilibrium vacancies with higher concentration segregate at the boundaries of the β-phase outside the precipitates. As established, increasing the annealing temperature and/or the concentration of tin and niobium induces the precipitates’ nucleation. The addition of tin leads to the formation of a larger number of smaller precipitates, while reducing the concentration of niobium decreases significantly their density. As shown, reducing the annealing temperature improves the mechanical properties. An addition of tin results in elevated values of the yield and strength limits for the alloy.
Key words: phase-field method, numerical modelling, precipitates of secondary phases, statistical properties.
URL: https://mfint.imp.kiev.ua/en/abstract/v47/i11/1149.html
DOI: https://doi.org/10.15407/mfint.47.11.1149
PACS: 61.72.Bb, 61.72.Cc, 61.72.jd, 61.72.Qq, 61.72.S-, 62.20.F-, 83.50.-v
Citation: V. O. Kharchenko, D. O. Kharchenko, O. M. Shchokotova, O. B. Lysenko, S. V. Kokhan, D. V. Leykykh, and A. V. Dvornychenko, Analysis of the Influence of Alloying Elements and Annealing Temperature on the Microstructure of Zr–Nb–Sn Alloys and Mechanical Properties during Deformations, Metallofiz. Noveishie Tekhnol., 47, No. 11: 1149–1170 (2025) (in Ukrainian)