Interphase Precipitation – An Interfacial Segregation Model

Clark, Samuel J.; Janík, Vít; Lan, Ya‐Qian; Sridhar, Seetharaman

doi:10.2355/isijinternational.isijint-2016-544

Cited by 11 publications

(12 citation statements)

References 49 publications

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“…This allowed for the prediction of the evolution of inter-sheet-spacing of interphase carbides in multicomponent alloys. 32) It was shown that the general trend of refining inter-sheet spacing with growing α half-thickness can be well predicted by the proposed model. However, the α fraction transformed at 973 K in the V-HSLA considered was simulated to increase from 0 to 90% within 25 s, which was only in general agreement with the kinetics measured using dilatometry.…”

Section: Introductionmentioning

confidence: 82%

See 1 more Smart Citation

A Gibbs Energy Balance Model for Growth Via Diffusional Growth-Ledges

Clark

Lan

Rahnama³

et al. 2019

ISIJ Int.

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Section: Introductionmentioning

confidence: 82%

“…The model derived in this work takes the same basis as our previous paper, 32) utilizing the recently proposed Gibbs Energy Balance (GEB) approach. 44,45) In this approach, a balance is found between the local driving force at the interfacial region 46)…”

Section: The Quasi-1d Model 21 Geometric Description Of Ledged Intementioning

confidence: 99%

A Gibbs Energy Balance Model for Growth Via Diffusional Growth-Ledges

Clark

Lan

Rahnama³

et al. 2019

ISIJ Int.

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“…This was because the interphase precipitation was a major microstructural contributor to the hardness (strength) 11 . The interphase precipitation resulted in a strengthening of the matrix 24 . The strengthening effect was apparent for this condition.…”

Section: The Interphase Precipitation and The Hardnessmentioning

confidence: 99%

The Influence of Isothermal Holding Times on Microstructural Evolution of X90 Linepipe Steel

Zhou

Xi-nan

et al. 2019

Mat. Res.

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Microstructural phase of linepipe steels depends on different isothermal conditions. Thermal cycling testing of X90 linepipe steel was conducted using a thermomechanical simulator. The results have shown that with increased holding time, the microstructure constituents change from the martensite and bainitic ferrites to granular bainite and polygonal ferrite. There was the amount of martensite in the microstructure for isothermal holding times of 5 and 10 s at 700ºC. The effects of the martensite strengthening were weak. The changes of the hardness curve are decided by microstructural phase and the precipitation behavior. The interphase precipitation seems to begin for isothermal holding times greater than 30 s. It has a peak value for isothermal holding time of 600 s. Some fcc (Ti, Nb) (N, C) particles which belong to the MX-type precipitates were obtained at this condition. It is a major microstructural contributor to the hardness. The beneficial effects of the precipitates decreased considerably due to coarsening of the precipitates with prolonged holding, which results in the hardness quickly dropping. As a result, the hardness exhibited a low value after isothermal holding for 3600 s because the extent of precipitation strengthening was lessened and a lot of polygonal ferrites were formed.

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“…A number of analytical models have been previously developed [12,13,14,15,16,17,18,19,20], which have primarily focussed upon the prediction of spacing between 45 sheets of interphase carbides. Although, this enables some guidance of the the processing windows for hot-rolled automotive sheets a more holistic modelling approach with the capability to simultaneously predict the morphology and nature of interphase carbide precipitates [21] as well as the inter-sheet spacing is required to truly optimise processing.…”

Section: Modelling Of Interphase Precipitationmentioning

confidence: 99%

“…The purpose of this work is to provide a developmental step in the understanding of precipitation phenomena and elucidating the nature of precipitation at interphase interfaces in multi-component alloys. 20 …”

Section: Introductionmentioning

confidence: 99%

A phase-field model for interphase precipitation in V-micro-alloyed structural steels

Rahnama

Clark

Janík

et al. 2017

Computational Materials Science

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A multi-component phase field model was developed based on CALPHAD method and directly coupled with the CALPHAD thermodynamic database using a four-sublattice model. Interphase carbide precipitation at the γ/α interface is simulated and the predictions are tested against reported experimental results for a medium carbon, vanadium micro-alloyed steel during an isothermal γ → α + M C transformation at 973 K. The model is found to be able to accurately predict: interphase precipitate composition, morphology and size of the precipitates. Furthermore, the tip-to-tip pairing of interphase precipitates in γ/α interphase boundaries is elucidated and found to be attributable to the minimisation of interfacial energy.

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Interphase Precipitation – An Interfacial Segregation Model

Cited by 11 publications

References 49 publications

A Gibbs Energy Balance Model for Growth Via Diffusional Growth-Ledges

A Gibbs Energy Balance Model for Growth Via Diffusional Growth-Ledges

The Influence of Isothermal Holding Times on Microstructural Evolution of X90 Linepipe Steel

A phase-field model for interphase precipitation in V-micro-alloyed structural steels

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