On the magnetic anisotropy of superduplex stainless steel

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

ElMassalami, M.¹  Palatnik-de-Sousa, I.¹  Areiza, M. C. L.²  Rebello, J. M. A.²  Elzubair, A.³ 

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

[2] LNCD COPPE UFRJ, BR-21941972 Rio De Janeiro, Brazil

[3] Inst Nacl Tecnol, BR-20081312 Rio De Janeiro, Brazil

关键词: Superduplex;    Magnetic anisotropy;    Microstructure;    Shape anisotropy;    Texture anisotropy;   

DOI  :  10.1016/j.jmmm.2011.05.007

来源: Elsevier

【 摘 要 】

The austenite-ferrite superduplex stainless steel (SDSS) is essentially an Fe-Cr-Ni alloy to which additional elements (e.g. Mo, Mn, Si, Cu, C, P, S) were added so as to confer additional advantageous characteristics such as higher mechanical strength and resistance to corrosion. Many of its applications require the process of rolling which, due to the two-phase character, induces a marked texturing, elongation of grains, and directional ordering in each of the constituent phases. This, in turn, imprints a strong anisotropic features in the mechanical, magnetic, and other properties. Using various experimental techniques, such as magnetization and ac susceptibility, this work investigated the induced magnetic anisotropy. An easy axis (parallel to the rolling direction) anisotropy was observed. The nature of the magnetic anisotropy, manifested during low and high applied magnetic fields, will be discussed in terms of the combined influences of two main anisotropies, namely shape anisotropy (arising from demagnetizing forces) and texture anisotropy (arising from the induced preferred orientation). (C) 2011 Elsevier B.V. All rights reserved.

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