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Activation Parameters of Viscoelasticity Formation of Nitride-Hardened Refractory Alloyстатья
- Авторы: Levin D.M., Frolov D.O., Manokhin S.S.
- Журнал: Russian Physics Journal
- Том: 65
- Номер: 7
- Год издания: 2022
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 1155
- Последняя страница: 1166
- DOI: 10.1007/s11182-022-02745-8
- Аннотация: The paper presents the measurement results of the internal friction high temperature background for the VZh171 refractory alloy before and after its nitridation. The obtained data are used to study mechanisms of the alloy transition from the elastic to viscoelastic state at elevated temperatures. The nitridation process leads to a rise of the transition temperature from 571 K (initial state) to 763 K (after nitridation). The activation energy of the internal friction high temperature background is 0.63 +/- 0.01 and 0.59 +/- 0.01 eV before and after the bulk nitridation, respectively. The activation energy of processes responsible for the formation of viscoelastic properties, is asymptotic to 2.52 and asymptotic to 2.36 eV before and after the bulk nitridation, respectively. These values correspond to the self-diffusion activation energy in nickel, the main component of the alloy matrix. The presence of the dispersed nitride phase in the matrix decreases the activation energy of viscoelastic processes by about 6%. Possible reasons are considered for changes in the nitridation-induced transition temperature and activation energy of viscoelastic processes at moderately high temperatures.
- Добавил в систему: Манохин Сергей Сергеевич