Physics of the Solid State
Evolution of the defective structure during long-term loading of ultrafine-grained titanium VT1-0 obtained by intensive plastic deformation
Betekhtin V.I.
1, Kadomtsev A. G.
1, Narykova M. V.
1, Lihachev A. I.
1, Amosova O. V.
1, Saenko M. Yu.2, Kolobov Yu. R.
3
1Ioffe Institute, St. Petersburg, Russia
2Belgorod National Research University, Belgorod, Russia
3Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia
2Belgorod National Research University, Belgorod, Russia
3Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, Russia
Email: andrej.kadomtsev@mail.ioffe.ru, Maria.Narykova@mail.ioffe.ru, Lihachev@mail.ioffe.ru, Saenkomik@gmail.com, kolobov@icp.ac.ru
For high-strength titanium VT1-0, the ultrafine-grained structure of which was obtained by mechanical-thermal treatment using the methods of helical and longitudinal rolling followed by annealing to relieve stress of the first kind. The effect of long-term loading in the creep mode at elevated temperature on the size and shape of grains has been studied. A similar study was previously carried out for recrystallized coarse-grained titanium transferred from the ultrafine-grained state by isothermal annealing. Based on the data obtained in the work and the previous results of the authors, the factors affecting the mechanical stability (durability) of ultrafine-grained metals obtained under severe plastic deformation were analyzed. Keywords: creep, durability, nanopores, ultrafine-grained metals, titanium, recrystallization.
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