Features of the Order–Disorder Phase Transition during the Ordering of Ni4Mo and Ni4W Alloys with D1a Superstructure
- Autores: Fedorischeva M.V.1, Klopotov A.A.2,3, Potekaev A.I.3, Marchenko E.S.3, Popov A.A.4, Kozireva R.A.2
-
Afiliações:
- Institute of Strength Physics and Materials Science, Siberian Branch
- Tomsk State University of Architecture and Building
- National Research Tomsk State University
- Khakas State University
- Edição: Volume 82, Nº 7 (2018)
- Páginas: 867-869
- Seção: Article
- URL: https://journals.rcsi.science/1062-8738/article/view/185459
- DOI: https://doi.org/10.3103/S1062873818070183
- ID: 185459
Citar
Resumo
Results are presented from studying atomic long-range order in Ni4Mo and Ni4W alloys via X-ray diffraction analysis. The phase transitions in these alloys are confirmed to be of the D1a → A1 type. The temperature dependences of the long-range order parameters are found to be similar in Ni4Mo and Ni4W alloys. The difference between their properties is due to different characters of the order–disorder phase transition. A transition from the single-phase state with D1a superstructure to single-phase А1 through the diphase (D1a → A1) region occurs in the Ni4Mo alloy. A more complex D1a → (A1 + δ) peritectoid transformation takes place in the Ni4W alloy. It is shown that an order parameter equal to unity can be obtained in Ni4Mo alloy through long-term ordering annealing, while such long-range order in Ni4W alloy (ηmax = 0.9) is impossible to obtain by annealing.
Sobre autores
M. Fedorischeva
Institute of Strength Physics and Materials Science, Siberian Branch
Autor responsável pela correspondência
Email: Fed_mv@mail.ru
Rússia, Tomsk, 634055
A. Klopotov
Tomsk State University of Architecture and Building; National Research Tomsk State University
Email: Fed_mv@mail.ru
Rússia, Tomsk, 634003; Tomsk, 634050
A. Potekaev
National Research Tomsk State University
Email: Fed_mv@mail.ru
Rússia, Tomsk, 634050
E. Marchenko
National Research Tomsk State University
Email: Fed_mv@mail.ru
Rússia, Tomsk, 634050
A. Popov
Khakas State University
Email: Fed_mv@mail.ru
Rússia, Abakan, 655000
R. Kozireva
Tomsk State University of Architecture and Building
Email: Fed_mv@mail.ru
Rússia, Tomsk, 634003
Arquivos suplementares
