Effect of severe plastic deformation on the saturation magnetization of ferromagnetic DO3-type ordered Fe3Al alloy

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Glezer, A.M.^1,2 ; Timshin, I.A.^1 ; Libman, M.A.^2 ; Shchetinin, I.V.^1 ; Savchenko, E.S.^1 ; Tomchuk, A.A.^2 ; Sundeev, R.V.^3

National University of Science and Technology MISIS, 4 Lenin av., Moscow

119049, Russia^1

I.P. Bardin Science Institute for Ferrous Metallurgy, 23/9 Radio st., Moscow

105005, Russia^2

MIREA - Russian Technological University, 78 Vernadsky av., Moscow

119454, Russia^3

关键词: Bridgman anvils;    Deformation parameter;    Equilibrium state;    High pressure torsions;    Long range orders;    Severe plastic deformations;    Specific saturation magnetization;    Theoretical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012002/pdf
DOI  :  10.1088/1757-899X/447/1/012002

来源: IOP

【 摘 要 】

The effect of severe plastic deformation in Bridgman anvils at room temperature on the specific saturation magnetization (SSM) of the ferromagnetic DO3 ordered Fe-24 at.% Al alloy was studied by X-Ray diffraction analysis and magnetic measurements. High pressure torsion at certain deformation parameters was shown to fully suppress the long-range ordering in the alloy and simultaneously increase its SSM by 11% relative to that in the equilibrium state. A theoretical model which qualitatively explains this phenomenon is proposed.