Magnetic and structural properties of ion nitrided stainless steel

Basso, Rafaela; Pimentel, Vinicius do Lago; Weber, S.; Marcos, G.; Czerwiec, T.; Baumvol, Israel Jacob Rabin; Figueroa, Carlos A.

doi:10.1063/1.3153945

Cited by 37 publications

(27 citation statements)

References 45 publications

(38 reference statements)

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“…Larger domain size and different domain morphology observed for the 6 and 20 h samples may be due to thicker γ N layers and due to the distribution of CrN particles within the γ N matrix. A recent investigation [25] of magnetic and structural properties of an ion nitrided 316 SS suggest that magnetic domain pattern variations can be associated with crystal anisotropy, grain boundary, crystalline Table 2 Lattice parameters, a, in Å for the CoCrMo alloy fcc γ substrate phase and the fcc γ N phase. Δa/a refers to the relative difference in lattice spacing and is given by Δa/a = [{a(γ N ) − a(γ)} / a(γ)].…”

Section: Magnetic Behaviormentioning

confidence: 99%

Magnetic layer formation on plasma nitrided CoCrMo alloy

Öztürk¹,

Okur²,

Pichon³

et al. 2011

Surface and Coatings Technology

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Section: Magnetic Behaviormentioning

confidence: 99%

Magnetic layer formation on plasma nitrided CoCrMo alloy

Öztürk¹,

Okur²,

Pichon³

et al. 2011

Surface and Coatings Technology

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“…Similar MFM analyses of nitride austenitic stainless steel samples were reported in Refs. [74,83] .MFM imaging on polished cross-sections of nitrided steel samples revealed that such sub-grain magnetic domains appeared only in the outer part of a nitride layer, i.e. where the nitrogen supersaturation is higher than the inner part as confirmed by SEM-EDX linear scans.…”

Section: Structural Characterizations By Atomic (Magnetic) Force Micrmentioning

confidence: 88%

“…The paramagnetic to ferromagnetic transition occurs by two mechanisms, namely, the rearrangement of 3d electrons after changing FeCrNi atomic distances and the formation of metallic nitrides [36]. In the nitride FeCrNi stainless steel, the induced ferromagnetism implies the dominant Cr-N interaction which removes the Cr 3d electrons from the metal alloy valence band and leaves ferromagnetic Fe and Ni [83] . Moreover, the magnetic domains observed suggest heterogeneous distribution of the Cr-N bonds inside the nitrided austenite.…”

Section: Structural Characterizations By Atomic (Magnetic) Force Micrmentioning

confidence: 99%

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From Micro to Nano Scales -Recent Progress in the Characterization of Nitrided Austenitic Stainless Steels

Luo¹

2015

Int J Nanomed Nanosurg

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In the frontier of materials science, understanding of materials has been in multiple scales from macro, micro, to atomic levels. This is attributed to the advanced instrumentations such as SEM, TEM, XPS, XRD, as well as several other spectroscopic and metallographic analyses. Fe-CrNi based austenitic stainless steels have a diverse range of modern applications ranging from biomedical prostheses in human bodies, food processing, to chemical engineering and nuclear power generation. The outstanding properties of the nitrided steels have attracted extensive research activities attempting to obtain a clear image on the structural characteristics of the structure, including nano-scale heterogeneity of the expanded austenite phase resulted from atomic-level chemical or electronic interactions in the alloying system. This paper provides a review on the structural characterization of nitrided austenitic stainless steels, with an emphasis on the latest experimental findings through the use of these sophisticated analytical tools. In the final section, several possible aspects of future studies are discussed.

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“…Low temperature nitriding produces thin layer of expanded austenite phase which improve their hardness and corrosion resistant. This expanded austenite phase is ferromagnetic [5,6]. Furthermore this phase cause weakly ferromagnetic properties of nitride austenitic stainless steel.…”

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confidence: 99%

Magnetic Properties of Austenitic Stainless Steel 316l and 316lvm after High Temperature Gas Nitriding Treatment

Suprihanto

2017

Rot.

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Biometallic materials for implant devices not only have to good corrosion resistance but also stable nonmagnetic properties. Various method have been developed for enhanced the corrosion resistance i.e low temperature gas nitriding treatments. Unfortunatelly, low temperature gas nitriding produce weakly ferromagnetic due the presence of expanded austenitic phases. Another treatments methods which is capable for improvement the mechanical properties is high temperature gas nitriding. However, the evaluation of magnetic properties of austenitic stainless steel 316L and 316LVM not yet investigation. The evaluation of magnetic properties of austenitis stainless steel 316L and 316LVM after high temperature gas nitriding treatments have been succesfully done. The magnetic properties are evaluated by vibrating sample magnetometre (VSM) test. The magnetic properties such as magnetic remenance, magnetic saturation and magnetic permeability are improved. As treated 316L and 316LVM have more stable non-magnetic properties and they more safe and compatible for MRI test.Keywords: 316L, 316LVM, high temperature gas nitriding, magnetic properties, MRI 1.Introduction Austenitic stainless steel 316L and 316LVM are ones of metallic biomaterial that widely used as implants and medical devices. The corrosion resistance can be used as the parameter of their biocompatibility [1]. Recently, increasing of corrosion resistance is not only concern for improvement of metallic biomaterial but also stable nonmagnetic properties. The development magnetic resonance imaging (MRI) as clinical imaging tools needs metallic biomaterial that has stable non-magnetic properties. The principal issues for MRI safety and compatibility are magnetically induced displacements and torque, RF heating and image artifact [2]. Implanted and medical devices from austenitic stainless steel meet the MRI safety and compatibility in the up to 1.5T systems. However the developments of new 3.0T MR system cause their MR compatibility being decrease [3,4].Various surface treatments such as gas nitriding, ion implantation, and plasma nitriding have been successfully applied to enhance their corrosion resistance. These treatments usually have been conducted at low temperature or below the austenite temperature. Low temperature nitriding produces thin layer of expanded austenite phase which improve their hardness and corrosion resistant. This expanded austenite phase is ferromagnetic [5,6]. Furthermore this phase cause weakly ferromagnetic properties of nitride austenitic stainless steel.In the previous research, HTGN treatment increase the corrosion resistance of 316L and 316LVM [7,8]. However the effect of HTGN treatments on the magnetic behavior of its materials not yet investigation. This papers deal with the effect of HTGN treatment on the magnetic properties of 316L and 316LVM. 2.Materials and methods Specimens were prepared from 316L and 316LVM plate. The chemical compositions of the specimens are shown in table 1. Specimens were rinsed using ultrasonic clea...

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Magnetic and structural properties of ion nitrided stainless steel

Cited by 37 publications

References 45 publications

Magnetic layer formation on plasma nitrided CoCrMo alloy

Magnetic layer formation on plasma nitrided CoCrMo alloy

From Micro to Nano Scales -Recent Progress in the Characterization of Nitrided Austenitic Stainless Steels

Magnetic Properties of Austenitic Stainless Steel 316l and 316lvm after High Temperature Gas Nitriding Treatment

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