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
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 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.
Keywords
dissipation and accumulation of energy,
thermo-physical properties,
ultrafine-grained structure,
Zr-1 wt.% Nb and Ti-45 wt.% Nb alloysAuthors
| Legostaeva E.V. | Institute of Strength Physics and Materials Science of SB RAS | lego@ispms.tsc.ru |
| Sharkeev Yu.P. | Institute of Strength Physics and Materials Science of SB RAS | sharkeev@ispms.tsc.ru |
| Belyavskaya O.A. | Institute of Strength Physics and Materials Science of SB RAS | obel@ispms.tsc.ru |
| Vavilov V.P. | National Research Tomsk Polytechnic University | vavilov@tpu.ru |
| Skrypnyak V.A. | National Research Tomsk State University | skrp2006@yandex.ru |
| Zhilyakov A.Yu. | Ural Federal University named after the first President of Russia B.N. Yeltsin | a.y.zhilyakov@urfu.ru |
| Kouznetsov V.P. | Ural Federal University named after the first President of Russia B.N. Yeltsin | wpkuzn@mail.ru |
| Eroshenko A.Yu. | Institute of Strength Physics and Materials Science of SB RAS | eroshenko@ispms.tsc.ru |
Всего: 8
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