Effect of selenium on the structure and properties of structural steel

Gol'dshtein, Ya. E.; Mushtakova, T. L.; Komissarova, T. A.

doi:10.1007/bf00708374

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…5). By analogy to the results previously reported by Goldshtein et al [19], these grains, which seem to be globularizations of non-metallic inclusions, are due to a non-reactant selenium deposits.…”

Section: Morphological Characterizationsupporting

confidence: 58%

A study of sulfur/selenium substitution effects on physical and mechanical properties of vacuum-grown ZnS1−xSex compounds using Boubaker polynomials expansion scheme (BPES)

Fridjine

Mahmoud

Amlouk

et al. 2009

Journal of Alloys and Compounds

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Section: Morphological Characterizationsupporting

confidence: 58%

A study of sulfur/selenium substitution effects on physical and mechanical properties of vacuum-grown ZnS1−xSex compounds using Boubaker polynomials expansion scheme (BPES)

Fridjine

Mahmoud

Amlouk

et al. 2009

Journal of Alloys and Compounds

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“…Due to the extremely low solubility of Se in steel matrix, especially in Cr, Ni, Mo alloyed 4140 steel, the influence of Se on steel machinability is mainly dependent on the characteristics of non-metallic inclusions formed in steel. 16) The set of factors and their possible mutual interactions during machining of HR and QT steels are schematically shown in Fig. 13.…”

Section: Influencing Mechanisms Of Se On Machinabilitymentioning

confidence: 99%

“…15) Selenium and tellurium belong to the same group of elements in a periodic table as sulfur, and even a small amount of these elements can improve the machinability of carbon steels. However, the mechanism of such improvement in machinability by micro-alloying with these elements is still under investigation [16][17][18][19][20] and is not clear. Gol'dshtein et al [16][17][18] investigated the effect of Se on the properties of structural steel.…”

Section: Introductionmentioning

confidence: 99%

“…However, the mechanism of such improvement in machinability by micro-alloying with these elements is still under investigation [16][17][18][19][20] and is not clear. Gol'dshtein et al [16][17][18] investigated the effect of Se on the properties of structural steel. The investigators found that the addition of Se to steel promoted the formation of globular sulfides and an improvement to machinability was confirmed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Selenium on the Machinability of As-hot Rolled and Heat Treated 4140 Steel

et al. 2020

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This study aims to clarify the effect of selenium (Se) on the machinability of AISI 4140 steel in the as-hot rolled (HR) and quenched and tempered (QT) conditions. Machining tests were conducted to examine the progressive tool flank wear and the chip formation. The characteristics of the workpiece materials such as hardness, microstructure, and non-metallic inclusions were investigated. The worn tools were analyzed to characterize the possible deposit formed on the tool surface. In addition, micro-computed tomography (μ-CT) and high-resolution transmission electron microscopy (TEM) were utilized to study the Mn(S,Se) inclusions in severely deformed chips. The investigation showed that Se micro-alloying did not improve the machinability of the HR 4140 steel. However, in the QT condition, the superior machinability was observed for the Se-treated 4140 steel when compared with the untreated steel. Therefore, the effect of Se on improving steel machinability was considered to be strongly dependent on the structure and properties of metal matrix. The factors influencing the improvement in machinability of Se-treated QT steel are discussed.

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“…Toxic concentrations of selenium are found in the wastewaters of steel mills, where the element is used for the production of machinable steels, , or factories producing semiconductors, solar batteries, photoelectric cells, insecticides, fungicides, copper alloys, or glassware . In these and other applications, it is desirable to remove high selenium concentrations from industrial wastewaters by a simple chemical process leading to a Se-containing precipitate that can be mechanically captured.…”

Section: Introductionmentioning

confidence: 99%

Removal of Selenite from Water Using a Synthetic Dithiolate: An Experimental and Quantum Chemical Investigation

et al. 2014

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Combination of the dithiol N,N'-bis(2-mercaptoethyl)isophthalamide, abbreviated as BDTH2 and as 1, with excess H2SeO3 in aqueous acidic (pH ≈ 1) conditions resulted in precipitation of BDT(S-Se-S) (6), with a (77)Se NMR chemical shift of δ = 675 ppm, and oxidized BDT. When the reaction is conducted under basic conditions Se(IV) is reduced to red Se(0) and oxidized 1. No reaction takes place between 1 and selenate (Se(VI)) under acidic or basic conditions. Compound 6 is stable in air but decomposes to red Se(0) and the disulfide BDT(S-S) (9) with heating and in basic solutions. Mechanisms and energetics of the reactions leading to 6 in aqueous solution were unraveled by extensive calculations at the ωB97X-D/aug-cc-pVTZ-PP level of theory. NMR chemical shift calculations with the gauge-independent atomic orbital (GIAO) method for dimethyl sulfoxide as solvent confirm the generation of 6 (calculated δ value = 677 ppm). These results define the conditions and limitations of using 1 for the removal of selenite from wastewaters. Compound 6 is a rare example of a bidentate selenium dithiolate and provides insight into biological selenium toxicity.

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Effect of selenium on the structure and properties of structural steel

Cited by 9 publications

References 2 publications

A study of sulfur/selenium substitution effects on physical and mechanical properties of vacuum-grown ZnS1−xSex compounds using Boubaker polynomials expansion scheme (BPES)

A study of sulfur/selenium substitution effects on physical and mechanical properties of vacuum-grown ZnS1−xSex compounds using Boubaker polynomials expansion scheme (BPES)

Effect of Selenium on the Machinability of As-hot Rolled and Heat Treated 4140 Steel

Removal of Selenite from Water Using a Synthetic Dithiolate: An Experimental and Quantum Chemical Investigation

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