Abstract
The effect of severe plastic deformation (SPD) by torsion and subsequent annealing on the structure and magnetic properties of the cast Nd9.5Fe84.5B6 alloy is studied. SPD by torsion is shown to lead to partial amorphization of the Nd2Fe14B phase and the precipitation of α-Fe; subsequent annealing results in the crystallization of the amorphous phase and the formation of a nanocomposite Nd2Fe14B/α-Fe structure. After SPD by torsion at 20 revolutions and annealing at 873 K, the (101) texture is formed; in this case, the coercive force is H c = 360 kA/m and the maximum energy product is (BH) max = 166 kJ/m3. The residual magnetization and the squareness ratio of the hysteretic loop of the textured alloy decrease as the ambient temperature decreases.
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Original Russian Text © V.P. Menushenkov, I.V. Shchetinin, S.V. Chernykh, A.G. Savchenko, M.V. Gorshenkov, D.G. Zhukov, 2017, published in Deformatsiya i Razrushenie Materialov, 2017, No. 8, pp. 18–23.
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Menushenkov, V.P., Shchetinin, I.V., Chernykh, S.V. et al. Structure and magnetic properties of the Nd9.5Fe84.5B6 alloy subjected to severe plastic deformation and annealing. Russ. Metall. 2017, 801–806 (2017). https://doi.org/10.1134/S0036029517100123
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DOI: https://doi.org/10.1134/S0036029517100123