Effect of subgrain structure on the kinetics of phosphorus segregation in grain boundaries

Sorokin, M.V.; Lavrukhina, Z.V.; Khodan, A. N.; Maltsev, D.A.; Bokstein, Boris S.; Rodin, A. O.; Ryazanov, A. I.; Гурович, Б. А.

doi:10.1016/j.matlet.2015.05.145

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…Diffusional model with account of the subgrain structure of 0.15C2CrNiMoVA-Asteel [15]): Taking into account phosphorus depletion in the bulk and its enhanced diffusion via subgrain boundaries, the following equation for the phosphorus concentration within GBs can be obtained: 0 C is the initial phosphorus concentration in the bulk; R is subgrain radius; D is phosphorus diffusion coefficient in the bulk. Figure 1 demonstrates kinetic curves, plotted according to the described models on the same experimental dataset, given in the Table 3.…”

Section: 3mentioning

confidence: 99%

Kinetics of Phosphorus Segregation in the Grain Boundaries of VVER-1000 Pressure Vessel Steels

Bokstein

Khodan

Sorokin

et al. 2017

DDF

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Methods of AES quantitative analysis were developed and applied for the determination of element concentrations at the surfaces of brittle fractures along grain boundaries. An attempt was made to take into account the presence of carbide precipitates and cleavage areas in the zone of the Auger analysis of their impact on the results of quantitative measurements. Obtained data were used for evaluation of the phosphorous segregation kinetics. The obtained results are consistent with thermodynamic modeling with CALPHAD method.Kinetics of segregation is analyzed with three models: (1) Langmuir - McLean theory; (2) model akin to kinetics of first order chemical reactions in solids; and (3) the model, which takes into account contribution of fast transport within subgrain networks and slow diffusion through the grain bulk. The two later models are in a good agreement with the experimental results.

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Section: 3mentioning

confidence: 99%

Kinetics of Phosphorus Segregation in the Grain Boundaries of VVER-1000 Pressure Vessel Steels

Bokstein

Khodan

Sorokin

et al. 2017

DDF

View full text Add to dashboard Cite

show abstract

“…The phosphorous effect can be leveled off by the Ni effect in PeFeeNi systems [9]. 7) Mo is incorporated as an explanatory parameter in addition to Ni in one of the considered models, since it is impossible to set apart the effects caused by Ni and Mo in the existing database.…”

Section: ) Phosphorous Concentration Is Not Included Into Explanatorymentioning

confidence: 99%

“…The form of the functional time dependence for the third model has been chosen in compliance with the analytical dependence of phosphorous segregation accumulation in grain boundaries from Ref. [9]:…”

Section: ) Phosphorous Concentration Is Not Included Into Explanatorymentioning

confidence: 99%

“…A revision of the weld metal surveillance specimen database has been recently performed at NRC KI. The updated database expanded with the information on the percent of an intergranular fracture [5,14] and phosphorous content in the grain boundaries [5,8,9] has enabled the development of TTS models for VVER-1000 weld metal during long-term holding at 310-320 C with regard for the results of microstructural studies [5e7,14].…”

Section: Introductionmentioning

confidence: 99%

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