Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Guttmann, M.

doi:10.1051/jp4:1995707

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…However, considering the experimental values from all sources for Sb, the agreement is fairly good (prediction is 7.5 kJ/mol; average of the literature data is 6 ± 4 kJ/mol). Similarly, good agreement exists with data for P (prediction is 4.5 kJ/mol; average of the literature data is 4 ± 4 kJ/mol). Experimental values of α I ( Fe ) for some solutes were also found to possess negative values (Table ).…”

Section: Discussionsupporting

confidence: 76%

“…In some cases, the values of α I ( Fe ) were found experimentally to be negligible, ie, they were considered to be zero. In Table , this is the case of Al, Cr, Mn, Mo, Ni, P, S, Sb, Si, Ti, and V, for which the predicted values are all below the limit of ±5 kJ/mol. In some papers, the difference between predicted and experimental values of α I ( Fe ) may slightly overcome the limit of ±5 kJ/mol as for S and Sb in Table .…”

Section: Discussionmentioning

confidence: 95%

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Prediction of binary interaction coefficients in grain boundary segregation

Lejček

Hofmann

2018

Surface & Interface Analysis

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A simple semiempirical method is proposed for prediction of the values of the binary interaction coefficients in grain boundary segregation (Fowler interaction). The method is based on the volume solid solubility, the maximum possible concentration of the solute at the grain boundary, and an additional parameter that represents an activity exponent of both the solute and the host metal. Values of the interaction coefficients for numerous solutes in α-iron are predicted. The comparison with available literature data shows reasonable agreement.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 95%

Prediction of binary interaction coefficients in grain boundary segregation

Lejček

Hofmann

2018

Surface & Interface Analysis

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“…Site competition develops at high values of surface coverage, when the near-surface sites approach saturation by the surface-active species. The latter behaviour occurs whether the surface-active solutes attract or repel, and ultimately results in the desegregation of the more weakly segregating species [8,9]. Also, a surface-active component can be prevented from segregating by strong attractive forces with a component with a high surface energy.…”

Section: Introductionmentioning

confidence: 97%

“…Within the early studies of segregation in ternary alloys, the term co-segregation points at the simultaneous segregation of a metallic and a non-metallic element [3,4]. The term co-segregation is nowadays used more broadly and independent of the nature of the segregating species [8]. Site competition develops at high values of surface coverage, when the near-surface sites approach saturation by the surface-active species.…”

Section: Introductionmentioning

confidence: 99%

Surface segregation in ternary Pt–Pd–Rh alloys studied with Monte Carlo simulations and the modified embedded atom method

Luyten

Creemers

2008

Surface Science

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“…1 Each impurity (C, N, P, S, etc.) in a solid solution has its own time-temperature interval for the preferential enrichment of a GB.…”

Section: Introductionmentioning

confidence: 99%

The kinetics of small-impurity grain-boundary-segregation formation in cold-rolled deep-drawing 08C-Al and IF steels during post-deformation annealing

Rashkovskiy¹,

Ковалев²,

Wainstein³

2015

Mater. Tehnol.

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An investigation of small-impurity grain-boundary-segregation (GBS) kinetics in deep-drawing steels (DDSs) allows us to improve the mechanical properties of these steels by optimizing the post-deformation heat-treatment parameters. The kinetics of the GBS formation for C, N, P and S was determined with a series of isothermal expositions of specimens in the spectrometer work chamber at temperatures of 250-650°C. The surface chemical composition of the samples was measured with Auger electron spectroscopy (AES). Isodose C-curves of the GBS for each detected impurity were plotted. The time -temperature intervals of the preferential GB enrichment with C, N, P, S were determined for the 08C-Al steel with various reduction ratios and for the IF-steels with various concentrations of the micro-alloying elements Nb and Ti. It was found that cold rolling of the 08C-Al steel with a reduction ratio from 48 % to 80 % dramatically increases the preferential carbon GBS temperature from 350°C to 450°C due to the necessity of the carbon detachment from Cottrell atmospheres with the annealing of dislocations. The influence of the IF-steel micro-alloying with Nb and Ti on the concurrent multicomponent GBS of interstitial and substitution impurities is also demonstrated in the article. Keywords: deep-drawing steels, IF-steels, grain-boundary segregation, Auger electron spectroscopy, annealing, dislocation structure, microalloying Preiskava kinetike segregacije ne~isto~po mejah zrn (GBS) v jeklih za globoki vlek (DDS) omogo~a izbolj{anje mehanskih lastnosti teh jekel z optimizacijo parametrov toplotne obdelave po hladni deformaciji. Kinetika nastanka GBS za C, N, P in S je bila dolo~ena s serijo izotermne izpostavitve vzorcev v delovni komori spektrometra pri temperaturah 250-650°C. Kemijska sestava povr{ine je bila izmerjena z Augerjevo elektronsko spektroskopijo (AES). Narisane so bile krivulje enakih odmerkov C za GBS za vsako odkrito ne~isto~o. Intervali~as -temperatura preferen~nih GB-obogatitev C, N, P, S so bili dolo~eni za 08C-Al jeklo pri razli~nih stopnjah redukcije in za IF-jekla z razli~nimi koncentracijami mikrolegirnih elementov Nb in Ti. Ugotovljeno je, da pri hladnem valjanju 08C-Al-jekla s stopnjo redukcije med 48 % in 80 % naraste preferen~na temperatura GBC ogljika iz 350°C na 450°C zaradi potrebe razdvojitve ogljika iz Cottrellovega oblaka z`arjenjem dislokacij. V~lanku je prikazan tudi vpliv mikrolegiranja z Nb in Ti v IF-jeklu na so~asno ve~komponentno GBS intersticijskih in substitucijskih ne~isto~.

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Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Cited by 13 publications

References 21 publications

Prediction of binary interaction coefficients in grain boundary segregation

Prediction of binary interaction coefficients in grain boundary segregation

Surface segregation in ternary Pt–Pd–Rh alloys studied with Monte Carlo simulations and the modified embedded atom method

The kinetics of small-impurity grain-boundary-segregation formation in cold-rolled deep-drawing 08C-Al and IF steels during post-deformation annealing

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