Study of the martensitic transformation in the Co–9 at % Al alloy


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Abstract

Phase transformations in the Co–9 at % Al have been investigated after slow furnace cooling. It has been shown that the structure and phase composition of the alloy after slow cooling do not correspond to the equilibrium phase diagram of the alloy of this chemical composition. It has been established that the α → ε martensitic transformation does not require overcooling and occurs even during a slow cooling of the alloy. It has been found that the formation of 4H modulated martensite is a specific feature of the binary alloys of cobalt and is not connected with the rate of their cooling. The Curie temperatures for the B2, α, and ε phases have been determined.

About the authors

N. V. Kazantseva

Institute of Metal Physics, Ural Branch; Yeltsin Ural Federal University (UrFU)

Author for correspondence.
Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

N. N. Stepanova

Institute of Metal Physics, Ural Branch; Yeltsin Ural Federal University (UrFU)

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

N. I. Vinogradova

Institute of Metal Physics, Ural Branch

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990

S. L. Demakov

Yeltsin Ural Federal University (UrFU)

Email: kazantseva-11@mail.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002

A. S. Yurovskikh

Yeltsin Ural Federal University (UrFU)

Email: kazantseva-11@mail.ru
Russian Federation, ul. Mira 19, Ekaterinburg, 620002

D. I. Davydov

Institute of Metal Physics, Ural Branch

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990

D. A. Shishkin

Institute of Metal Physics, Ural Branch; Yeltsin Ural Federal University (UrFU)

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

M. B. Rigmant

Institute of Metal Physics, Ural Branch; Yeltsin Ural Federal University (UrFU)

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

E. P. Romanov

Institute of Metal Physics, Ural Branch

Email: kazantseva-11@mail.ru
Russian Federation, ul. S. Kovalevskoi 18, Ekaterinburg, 620990

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