The influence of utrafine-grained state on thermo-physical properties of Zr-1 wt.% Nb and Ti-45 wt.% Nb alloys and processes of dissipation and accumulation of energy during deformation
Влияние ультрамелкозернистого состояния на теплофизические свойства сплавов Zr - 1 мас. % Nb и Ti - 45 мас. % Nb и процессы диссипации и накопления энергии при деформировании

E.V. Legostaeva, Institute of Strength Physics and Materials Science of SB RAS, Yu.P. Sharkeev, O.A. Belyavskaya, V.P. Vavilov, V.A. Skrypnyak, A.Yu. Zhilyakov, V.P. Kouznetsov, A.Yu. Eroshenko, Institute of Strength Physics and Materials Science of SB RAS, Institute of Strength Physics and Materials Science of SB RAS, National Research Tomsk Polytechnic University (+4 others)
2020 Izvestiya Vysshikh Uchebnykh Zavedenii. Fizika  
The results of studying the thermal conductivity and specific heat capacity of Zr-1 wt.% Nb and Ti-45 wt.% Nb in coarse-grained and ultrafine-grained states are presented. The influence of the utrafine-grained state on the thermo physical properties and the processes of dissipation and accumulation energy during deformation of the alloys are estimated. It is shown that formation of the ultrafine-grained state in the Zr-1 wt.% Nb alloy by abc -pressing and subsequent rolling leads to a decrease
more » ... eads to a decrease in its thermal conductivity and specific heat capacity by 10 and 20%, respectively, due to substructural hardening under severe plastic deformation. It is found that thermal conductivity and specific heat capacity of the ultrafine Ti-45 wt.% Nb alloy increase by 7.5 and 5%, respectively, due to dispersion hardening of the ω phase by nanoparticles and formation of a new α phase. It is established that the ultrafine-grained structure has a significant influence on the regularities of the dissipation and accumulation energy during plastic deformation, which in turn depend on their thermo-physical characteristics and on the structural and phase state.
doi:10.17223/00213411/63/11/28 fatcat:hqotreqiljbkvibu457um3zrya