First-principles investigation of Cr-doped Fe2B: Structural, mechanical, electronic and magnetic properties

Wei, Xiang; Chen, Zhiguo; Zhong, Jue; Wang, Li; Wang, Yipeng; Shu, Zhongliang

doi:10.1016/j.jmmm.2018.02.004

Cited by 16 publications

(8 citation statements)

References 38 publications

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“…The indentation hardness and indentation modulus for Fe 2 B distinguished according to the alloying element present, determined in this study, are consistent with reported values for similar borides [33,35,50]. However, there are discrepancies between the reported valued of hardness and modulus in the literature, alongside disagreement of the effect of the alloying elements in terms of decrease/increase of hardness/modulus of Fe 2 B [35,[50][51][52][53][54]. We were not able to obtain any information on the influence of alloying elements on mechanical properties of precipitated FeB phase, or information on the effect of alloying additions on FeB from first-principle, studies.…”

Section: Hardness and Modulus Of Feb And Fe 2 B Boridessupporting

confidence: 92%

“…For these alloys, the alloying elements have more influence on the hardness of FeB than on Fe 2 B phase. The indentation hardness and indentation modulus for Fe 2 B distinguished according to the alloying element present, determined in this study, are consistent with reported values for similar borides [33,35,50]. However, there are discrepancies between the reported valued of hardness and modulus in the literature, alongside disagreement of the effect of the alloying elements in terms of decrease/increase of hardness/modulus of Fe 2 B [35,[50][51][52][53][54].…”

Section: Hardness and Modulus Of Feb And Fe 2 B Boridessupporting

confidence: 84%

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The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

et al. 2020

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In this study, the influence of alloying elements on the mechanical properties of iron borides FeB and Fe2B formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) alloys were evaluated using instrumented indentation measurement. The microstructural characterization of the alloys was performed by means of X-ray diffraction and scanning electron microscope equipped with an energy dispersive X-ray analyzer. The fraction of the phases present in the alloys was determined either by the lever rule or by image analysis. The hardest and stiffest FeB formed in Fe-B-X (X = C, Cr, Mn) alloys was observed in the Fe-B-Cr alloys, where indentation hardness of HIT = 26.9 ± 1.4 GPa and indentation modulus of EIT = 486 ± 22 GPa were determined. The highest hardness of Fe2B was determined in the presence of tungsten as an alloying element, HIT = 20.8 ± 0.9 GPa. The lowest indentation hardness is measured in manganese alloyed FeB and Fe2B. In both FeB and Fe2B, an indentation size effect was observed, showing a decrease of hardness with increasing indentation depth.

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Section: Hardness and Modulus Of Feb And Fe 2 B Boridessupporting

confidence: 92%

Section: Hardness and Modulus Of Feb And Fe 2 B Boridessupporting

confidence: 84%

The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

et al. 2020

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“…The decrease of fish-bone M 2 B enhanced the impact toughness effectively according to Figure 6. Moreover, the hardness and fracture toughness of M 2 B rose with the substitution of Fe atoms by Cr and Mo atoms in the Fe 2 B lattice, referring to the previous study [28,33,37]. As a result, both the hardness and impact toughness increased with the ascending Mo concentration when it was no more than 2.10 wt.%.…”

Section: Mechanical Propertiessupporting

confidence: 67%

“…Besides, M 2 B was remarkably refined with the increase of Mo content. This may be the lower formation enthalpy of Mo 2 B compared with that of Fe 2 B and Cr 2 B, leading to a prior formation during solidification, which hindered the growth of eutectic borides and refined the microstructure [37]. It was also speculated that the change of bond energy in different directions of the Fe 2 B lattice was caused by the solid solution of the alloying elements, which was probably beneficial to the property of Fe 2 B [32,38].…”

Section: Microstructurementioning

confidence: 99%

Effect of Mo Concentration on the Microstructure Evolution and Properties of High Boron Cast Steel

et al. 2020

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The microstructure evolution, mechanical properties, and tribological properties of high boron cast steel (HBCS) with various Mo concentrations are investigated. The results indicate that Mo addition can significantly modify the microstructure and enhance the comprehensive properties. With the increase of Mo concentration, borides change from the original fish-bone Fe-rich and Cr-rich M2B to dendritic Fe-rich M2B, blocky and cluster-like Cr-rich M2B, and grainy Mo-rich M2B. The hardness of HBCS increases gradually with the increase of Mo content due to the solid solution strengthening and the refinement of M2B. It can be found that all the samples exhibit quasi-cleavage, but the impact toughness increases firstly and reaches the maximum value when the concentration of Mo is 2.10 wt.%, which is the result of the dispersive distribution of M2B rather than the original fish-bone M2B. Subsequently, the impact toughness begins to decrease as the concentration of Mo further increases because of the extensive formation of grainy Mo-rich M2B at the grain boundary. Meanwhile, the wear results reveal that the average friction coefficient and wear ratio decrease with the increase of Mo content, and the wear mechanism changes from abrasive wear and adhesive wear to abrasive wear when the concentration of Mo exceeds 2.10 wt.%.

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“…Amorphous boron (40 wt.%), Fe, Ni, Cr (10 wt.%), MgF2 (wt.50%) were used as a deposited powder mixture [17][18][19]. The tests to determine the corrosion resistance of materials were carried out by anodic etching in inhibited sulfuric acid and in an oxidizing environment with weight loss control [20][21][22]. Unmodified steel 12X18H9T was chosen as a standard [8].…”

Section: Methodsmentioning

confidence: 99%

Influence of alloying (Cr, Fe, Ni) on the corrosion resistance of layers formed by electron-beam processing

et al. 2022

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The paper presents the results of comparative analysis of the properties of coatings based on chromium, nickel and iron borides. The alloy obtained in the process of electron-beam surfacing of the powder mixture “amorphous boron – 10 wt.% chromium” has the best properties. This is explained by the structures, fine chromium borides Cr2B and complex iron borides (Fe, Cr)2B, distributed in the austenitic matrix. The material modified in this way in a nitric acid solution corrodes at a rate of 0.02 mm/year. In sulfuric acid, its corrosion rate is 0.81 mm/year.

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First-principles investigation of Cr-doped Fe2B: Structural, mechanical, electronic and magnetic properties

Cited by 16 publications

References 38 publications

The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

Effect of Mo Concentration on the Microstructure Evolution and Properties of High Boron Cast Steel

Influence of alloying (Cr, Fe, Ni) on the corrosion resistance of layers formed by electron-beam processing

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