Magnetocaloric Effect in a Ni2.25Mn0.75Ga0.93Si0.07 Alloy

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The results of a study of the magnetocaloric effect (MCE) in Ni2.25Mn0.75Ga0.93Si0.07 alloy are presented in the cast state and in the state after multi-axial isothermal forging (MIF) at 700°C and true degree of deformation e = 3.19. It is shown that as a result of MIF, the initial equiaxed microstructure is transformed into a bimodal one in which large grains 100–200 μm in size are surrounded by a layer of fine-grained microstructure.
As a result of MIF, the range of martensitic transformation is slightly shifted to the region of low temperatures by about 5°C. The analysis of phase transformations in the region of room temperatures shows that the intervals of martensitic and magnetic phase transformations are superimposed on each other. The MCE value in a magnetic field of 1.8 T is 0.59ºC in the initial cast state, and as a result of forging it decreases to 0.55°C.

Авторлар туралы

R. Gaifullin

Institute for Metals Superplasticity Problems, Russian Academy of Sciences

Email: irekmusabirov@mail.ru
Ufa, 450001 Russia

A. Gadzhiev

Institute of Physics, Russian Academy of Sciences

Email: irekmusabirov@mail.ru
Makhachkala, 367003 Russia

A. Aliev

Institute of Physics, Russian Academy of Sciences

Email: irekmusabirov@mail.ru
Makhachkala, 367003 Russia

S. Taskaev

Chelyabinsk State University

Email: irekmusabirov@mail.ru
Chelyabinsk, 454001 Russia

I, Musabirov

Institute for Metals Superplasticity Problems, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: irekmusabirov@mail.ru
Ufa, 450001 Russia

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