Condition of Boron in Alpha Iron

Thomas, W.R.; Leak, G. M.

doi:10.1038/176029b0

Cited by 43 publications

(8 citation statements)

References 2 publications

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“…Hasiguti and Kamoshita tested the internal friction in α‐iron and found boron to be interstitially dissolved. A subsequent study by Thomas and Leak also concluded that boron is interstitially dissolved in α‐Fe based on internal friction measurements on practically pure Fe (0.002 C and 0.001 N, wt%) containing 0.05 wt% B. This finding was further corroborated in a later study of as‐cast boron‐containing Fe–8 wt% Cr alloys, based on X‐ray and neutron diffractometry and inelastic neutron scattering by Calos et al The added boron is more likely to be interstitially dissolved in α‐Fe, rather than substitutionally dissolved.…”

Section: Thermodynamicsmentioning

confidence: 76%

Boron in Heat‐Treatable Steels: A Review

Sharma

Ortlepp

Bleck

2019

steel research int.

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The science and technology of boron addition to heat‐treatable steels are explained. The aim is to address the following: How to add boron to steel (i.e., the manufacturing aspects of boron addition to steel)? What precautions are necessary when alloying boron to steel, in terms of composition (mainly nitrogen, aluminum, and titanium contents), processing and heat treatment (i.e., material and process robustness and reproducibility for a consistent steel quality)? Where does boron go in steel (i.e., the state of boron, interstitial or substitutional solute, precipitate or a complex with other alloying elements; as well as the location of boron, i.e., dissolved as a solute in the grain or segregated at the grain boundary)? Which characterization methods are suitable for the detection of the very small amounts of boron (<30 wt ppm) in heat‐treatable steels? What does boron do in steel (i.e., its effect on hardenability and mechanical properties, specifically impact toughness)? How does it do and what it does (i.e., the physical mechanism by which it influences the properties)? How much boron is really required to achieve the desired properties in heat‐treatable steels (i.e., recommendations for the optimum boron content)?

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Section: Thermodynamicsmentioning

confidence: 76%

Boron in Heat‐Treatable Steels: A Review

Sharma

Ortlepp

Bleck

2019

steel research int.

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“…Experimental studies suggesting interstitial solution of B also exist. Thomas and Leak [38] and Hayashi and Sugeno [39] which is referred to as the shape factor [19]. Now the magnitude of the shape factor for B in bcc iron has been predicted.…”

Section: Force-dipole Tensor and  Tensormentioning

confidence: 99%

Ab initio characterization of B, C, N, and O in bcc iron: Solution and migration energies and elastic strain fields

Souissi

Chen

Sluiter

et al. 2016

Computational Materials Science

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Practical and reliable methods for theoretically determining the properties of B, C, N, and O in bcc iron have been explored by systematic DFT calculations. The energies of solution and migration, and the elastic strain fields due to the solute atom have been evaluated by supercell calculations under various conditions. By applying correction for spurious elastic interaction of the solute atom with its images in the periodic supercells, reasonable estimates of the solution energy have been obtained without employing very large supercells. The correction turned out unimportant for the migration energy, as it modifies the energies of the stable position and the saddle-point similarly. The lambda tensor, which uniquely characterizes the strain field induced by a solute atom, has been evaluated for the four species of various configurations, first through the force-dipole tensor obtained in zero-strain calculations, and second from changes in

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“…It is reasonable to believe that small atoms such as carbon enter into the octahedral site as they do in pure ␣-iron. [19][20][21][22] In fact, since the lattice parameters for the A2 phase increases with the concentration of substitutional solute atoms such as Al ͑Refs. 13 and 23͒ and Ga, 24 this will, in turn, increase the radius of octahedral site across the entire composition range, thereby further favoring the octahedral site preferentially.…”

Section: Discussionmentioning

confidence: 99%

Effect of carbon addition on the single crystalline magnetostriction of Fe-X (X=Al and Ga) alloys

Huang

McQueeney

et al. 2010

Journal of Applied Physics

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The effect of carbon addition on the magnetostriction of Fe-Ga and Fe-Al alloys was investigated and is summarized in this study. It was found that the addition of carbon generally increased the magnetostriction over binary alloys of Fe-Ga and Fe-Al systems. The formation of carbide in the Fe-Ga-C alloys with a composition near D0 3 phase region decreased the magnetostriction drastically. Fe-Al-C and Fe-Ga-C alloys responded differently to thermal treatments; the magnetostriction in the quenched Fe-Al-C alloys is equal to or slightly lower than that of the slow cooled as is observed in binary Fe-Al alloy; in contrast, the magnetostriction is generally higher in quenched Fe-Ga-C alloys than slow cooled condition, consistent with the behavior of binary alloys of Fe-Ga. A significant increase in magnetostriction between 25% and 165% depending on the phase region in Fe-Ga-C alloys by quenching was observed in the A2+D0 3 two-phase region and D0 3 single phase region. KeywordsPhysics and Astronomy, IPRT, alloying additions, aluminium alloys, carbon, gallium alloys, iron alloys, magnetostriction, quenching (thermal) Disciplines Condensed Matter Physics | Metallurgy CommentsThe following article appeared in Journal of Applied Physics 107 (2010) The effect of carbon addition on the magnetostriction of Fe-Ga and Fe-Al alloys was investigated and is summarized in this study. It was found that the addition of carbon generally increased the magnetostriction over binary alloys of Fe-Ga and Fe-Al systems. The formation of carbide in the Fe-Ga-C alloys with a composition near D0 3 phase region decreased the magnetostriction drastically. Fe-Al-C and Fe-Ga-C alloys responded differently to thermal treatments; the magnetostriction in the quenched Fe-Al-C alloys is equal to or slightly lower than that of the slow cooled as is observed in binary Fe-Al alloy; in contrast, the magnetostriction is generally higher in quenched Fe-Ga-C alloys than slow cooled condition, consistent with the behavior of binary alloys of Fe-Ga. A significant increase in magnetostriction between 25% and 165% depending on the phase region in Fe-Ga-C alloys by quenching was observed in the A2 + D0 3 two-phase region and D0 3 single phase region.

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Condition of Boron in Alpha Iron

Cited by 43 publications

References 2 publications

Boron in Heat‐Treatable Steels: A Review

Boron in Heat‐Treatable Steels: A Review

Ab initio characterization of B, C, N, and O in bcc iron: Solution and migration energies and elastic strain fields

Effect of carbon addition on the single crystalline magnetostriction of Fe-X (X=Al and Ga) alloys

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