Site competition in grain boundary segregation of phosphorus and nitrogen in iron

Erhart, H.; Grabke, H. J.

doi:10.1016/0036-9748(81)90197-6

Cited by 148 publications

(13 citation statements)

References 2 publications

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“…[6] We will also consider the following data relative to phosphorus segregation in iron: ϭ 21.5 Jиmol Ϫ1 иK Ϫ1 [12] ϭ Ϫ45 kJиmol Ϫ1 ({310} surface [13] )…”

Section: Effect Of Temperature On the Grain-boundary Cohesionmentioning

confidence: 99%

Synergetic effect of hardness and phosphorus grain-boundary segregation on the ductile-to-brittle transition temperature of 17-4 PH steel

Christien

Gall

Saindrenan

2003

Metall Mater Trans A

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The influence of hardness and phosphorus grain-boundary segregation (PGBS) on the ductile-to-brittle transition temperature (DBTT) of a 17-4 PH martensitic steel was studied. Thermal treatments including long-time aging at low temperature were made to get different hardness levels and different PGBS amounts. A synergetic effect between PGBS and hardness on the DBTT of the steel is evidenced; in other words, the DBTT shift due to PGBS increases with hardness. If hardness is low enough, PGBS can even have no effect on the DBTT. A tentative interpretation of this synergetic effect is proposed, based on the assumption that the detrimental effect of PGBS on the grain-boundary cohesion increases with temperature.

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“…[6] We will also consider the following data relative to phosphorus segregation in iron: ϭ 21.5 Jиmol Ϫ1 иK Ϫ1 [12] ϭ Ϫ45 kJиmol Ϫ1 ({310} surface [13] )…”

Section: Effect Of Temperature On the Grain-boundary Cohesionmentioning

confidence: 99%

Synergetic effect of hardness and phosphorus grain-boundary segregation on the ductile-to-brittle transition temperature of 17-4 PH steel

Christien

Gall

Saindrenan

2003

Metall Mater Trans A

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“…However, carbon can replace phosphorus from the grain boundaries by the site competition effect, when Fe-P alloys contain a low amount of carbon. [5,6] Fe-P alloys containing 0.01 to 0.05 wt pct carbon have exhibited good ductility. [7,8] Moreover, improved mechanical properties have been reported for vacuum-melted pure Fe-P alloys, after suitable control of the microstructure.…”

Section: Introductionmentioning

confidence: 99%

On Phase Distribution and Phase Transformations in Phosphoric Irons Studied by Metallography

Sahoo

Balasubramaniam

2007

Metall Mater Trans A

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The microstructures of novel phosphoric irons have been studied by metallography in order to understand the phase distribution and phase transformations in the iron-rich end of the Fe-P phase diagram. Both Nital etchant and Oberhoffer's reagent were effective in revealing dualphase microstructures of phosphoric irons that were heat treated in the (a + c) region. The phase distribution in dual-phase microstructures was analyzed by quantitative metallography and related to the phase diagram. The morphology of austenite depended on phosphorus content and heat-treatment temperature. The microsegregation of phosphorus and phosphorus diffusivity was studied as a function of the temperature and soaking time of the specimens. The beneficial effect of the heat treatment of phosphoric irons in the dual-phase region of the Fe-P phase diagram on mechanical behavior has been confirmed by tensile testing.

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“…However, from this point of view, N, 0, S, P, Si and Al are the obvious candidates for being "decohesive", N is marginal, while B and C may be called "cohesion enhancers". In fact, B, C and N were experimentally found to improve the GB cohesion in both Fe (12)(13)(14)(15)(16)(17) and W (18)(19)(20)(21)(22), while 0, Si, P and S, being strong embrittlers both in Fe and W (3,6,23,24), are believed to weaken the GB cohesion.…”

Section: Energetics Of Imnurities In Fe and W Gbs And The Site Comnetmentioning

confidence: 99%

“…We believe that an experimental investigation of the effect of B on ductility of Fe and W is of extreme importance. Recently (15,16), it was shown that B introduced in ppm quantities into an Fe-P alloy significantly improves the alloy ductility. At the same time, the Auger analysis showed the decrease in the P concentration on the fracture surfaces --a manifestation of the site competition effect.…”

Section: Energetics Of Imnurities In Fe and W Gbs And The Site Comnetmentioning

confidence: 99%

Site competition effect of impurities and grain boundary stability in iron and tungsten

Krasko

1993

Scripta Metallurgica et Materialia

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Site competition in grain boundary segregation of phosphorus and nitrogen in iron

Cited by 148 publications

References 2 publications

Synergetic effect of hardness and phosphorus grain-boundary segregation on the ductile-to-brittle transition temperature of 17-4 PH steel

Synergetic effect of hardness and phosphorus grain-boundary segregation on the ductile-to-brittle transition temperature of 17-4 PH steel

On Phase Distribution and Phase Transformations in Phosphoric Irons Studied by Metallography

Site competition effect of impurities and grain boundary stability in iron and tungsten

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