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<p>The paper focuses on the ultrafine-grained (UFG) structure of ternary β‑alloy systems based on titanium, niobium, and zirconium, which changes the processes of heat generation and energy dissipation and storage during their deformation. It is shown that in the initial stage of deformation of the coarse-grained Ti-39.5 Nb-5 Zr-2 Ta-2 Sn (TNZTS) and Ti-39.5 Nb-5Zr (TNZ) alloys up to ε = 0.05 and 0.75, respectively, all plastic energy is absorbed by the alloys, which is associated with the dispersion hardening by the α‑ and ω‑phase nanoparticles in the TNZ alloy. The formation of the UFG TNZTS and TNZ alloys provides an increase in the initial strain stage up to ε = 0.065 and 0.115, respectively, owing to a&#xa0;substructural strengthening during severe plastic deformation. It is found out that in the initial stage, the UFG TNZ alloy dissipates the energy more effectively than does the TNZTS alloy due to the presence of β + α + ω&#xa0;structure, substructural strengthening, and dispersion hardening by the α‑ and ω‑phase nanoparticles.</p>

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Influence of ultrafine-grained structure of Ti, Nb and Zr based β-alloys on heat generation and energy dissipation and storage during their deformation

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • E. V. Legostaeva,
  • A. Yu. Eroshenko,
  • Yu. P. Sharkeev

摘要

The paper focuses on the ultrafine-grained (UFG) structure of ternary β‑alloy systems based on titanium, niobium, and zirconium, which changes the processes of heat generation and energy dissipation and storage during their deformation. It is shown that in the initial stage of deformation of the coarse-grained Ti-39.5 Nb-5 Zr-2 Ta-2 Sn (TNZTS) and Ti-39.5 Nb-5Zr (TNZ) alloys up to ε = 0.05 and 0.75, respectively, all plastic energy is absorbed by the alloys, which is associated with the dispersion hardening by the α‑ and ω‑phase nanoparticles in the TNZ alloy. The formation of the UFG TNZTS and TNZ alloys provides an increase in the initial strain stage up to ε = 0.065 and 0.115, respectively, owing to a substructural strengthening during severe plastic deformation. It is found out that in the initial stage, the UFG TNZ alloy dissipates the energy more effectively than does the TNZTS alloy due to the presence of β + α + ω structure, substructural strengthening, and dispersion hardening by the α‑ and ω‑phase nanoparticles.