Structural, electronic and magnetic properties of Fe20Cr6Mn6 austenitic alloys with interstitial carbon and nitrogen atoms from density functional theory

Lv, Z.Q.; Liu, T.; Wu, Zhifang; Guan, Kang; Li, Y.

doi:10.1016/j.jmmm.2020.166663

Journal of Magnetism and Magnetic Materials

2020

DOI: 10.1016/j.jmmm.2020.166663

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Structural, electronic and magnetic properties of Fe20Cr6Mn6 austenitic alloys with interstitial carbon and nitrogen atoms from density functional theory

Z.Q. Lv

T. Liu

Zhifang Wu

et al.

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Cited by 4 publications

References 34 publications

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Effect of Deformation on the Magnetic Properties of C + N Austenitic Steel

Torres-Mejía,

Paredes-Gil,

Parra Vargas

et al. 2023

Metall Mater Trans A

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In this investigation, the effect of deformation on magnetic properties at low temperatures of FeCr18.2Mn18.9–0.96C + N high interstitial steel was studied. Tensile tests were carried out at room temperature and interrupted at 10, 20, and 30 pct deformation. Magnetic measurements were performed through the vibrating sample magnetometry (VSM) technique from 50 K to 370 K. Microstructural, morphological, and crystalline structural analyses by means of XRD and SEM showed that the material consisted of a homogenous and stable austenitic structure with no presence of α-martensite or ε-martensite. Twinning and dislocation cells are suggested as main deformation mechanisms. The material exhibits a paramagnetic–antiferromagnetic (TNéel) transition below 235 K. The Néel temperature of the material tends to increase due to the deformation. A decrease of the magnetization and magnetic susceptibility for the deformed material was measured. Ab initio calculations were performed and showed that the FCC phase is more stable when carbon and nitrogen are added as interstitial elements compared with the free C + N system, additionally, the critical transition temperature was calculated, with a value in agreement with the experimental data. An influence of the magnetic contribution on the SFE was established, being in the order of 5 mJ/m2.

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Effect of Deformation on the Magnetic Properties of C + N Austenitic Steel

Torres-Mejía,

Paredes-Gil,

Parra Vargas

et al. 2023

Metall Mater Trans A

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Effect of Deformation on the Magnetic Properties of CrMnFeCoNi and CrMnFeCoNi-CN High-Entropy Alloys

Torres-Mejía,

Parra-Vargas,

Lentz

et al. 2024

Metall Mater Trans A

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The magnetic behavior of two high-entropy alloys, CrMnFeCoNi and CrMnFeCoNi-CN, was investigated under varying degrees of deformation through uniaxial tensile tests. Microstructural, morphological, and crystalline structural analyses using XRD and SEM revealed a uniform and stable austenitic structure in all samples, with no presence of α’-martensite or ε-martensite phases. The main deformation mechanisms identified were twinning and slip dislocation for the CrMnFeCoNi-CN alloy, and slip dislocation for the CrMnFeCoNi alloy at room temperature. The alloys exhibited low magnetic moments attributed to magnetically frustrated configurations. At temperatures below 70 K, distinct magnetic states were observed ranging from paramagnetic to ferrimagnetic and spin-glass-like behavior. Antiferromagnetic interactions were confirmed by a negative paramagnetic Curie temperature for both alloys. The magnetization of the CrMnFeCoNi alloy increased with deformation, reflected in effective magnetic moments varying from 1.81 (0 pct) to 2.60 (20 pct) μB, while for the CrMnFeCoNi-CN alloy remained stable around 2.39 to 2.48 μB. The magnetization of the CrMnFeCoNi-CN alloy was found to be higher than that of the CrMnFeCoNi alloy, suggesting that the presence of C and N as alloying elements can enhance magnetization to some extent.

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Combined Effects of Carbon and Nitrogen in Fe20Cr6Mn6CN Alloys from First-Principles Calculation

Zhang

et al. 2021

J. of Materi Eng and Perform

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Structural, electronic and magnetic properties of Fe20Cr6Mn6 austenitic alloys with interstitial carbon and nitrogen atoms from density functional theory

Cited by 4 publications

References 34 publications

Effect of Deformation on the Magnetic Properties of C + N Austenitic Steel

Effect of Deformation on the Magnetic Properties of C + N Austenitic Steel

Effect of Deformation on the Magnetic Properties of CrMnFeCoNi and CrMnFeCoNi-CN High-Entropy Alloys

Combined Effects of Carbon and Nitrogen in Fe20Cr6Mn6CN Alloys from First-Principles Calculation

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