Thermal Properties, Energy Dissipation, and Storage During Deformation of Ultrafine Grained Ti-, Zr-, Nb-, and Mg-Based Alloys

The paper reviews research results of the ultrafine grained structure of titanium alloy and Zr–1Nb, Ti–45Nb, and Mg–Y–Nd alloys affecting their thermal properties and energy dissipation and storage during deformation. It was found that substructural strengthening during severe plastic deformation of ultrafine grained titanium and Zr–1Nb alloys reduces their heat capacity and thermal diffusivity by ~10% and changes the deformation and thermal behavior, especially at the initial stage of loading. It has been shown that dispersion hardening of the Ti–45Nb alloy with ω-phase nanoparticles and Mg–2.9Y–1.3Nd alloy with Mg₂₄Y₅-phase nanoparticles decreases the effect of the ultrafine grained structure on their thermal properties and energy dissipation and storage at the initial stage of tensile deformation.