Critical cooling rate for the glass formation of ferromagnetic Fe80P13C7 alloy

Xu, Kai; Wang, Yan; Li, Jinfeng; Li, Qiang

doi:10.1007/s40195-012-0117-1

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…For details of the volume-averaging procedure and the form of the macroscopic volume-averaged formulations, see Beckermann and Viskanata. 57) Further exploration of aspects of the volume-averaging procedure and assumptions were made by Ganesan, Poirier, and Voller et al 49,58) Following the pioneering works highlighted above, many studies used similar or modified versions of the same continuum equations to examine a number of different solidification phenomena, including channel formation in directionally-solidified alloys, [59][60][61][62][63][64] the effect of solidification shrinkage and pore formation, [63][64][65][66][67][68][69][70][71][72][73][74] and the effect of transformation-induced strains. [75][76][77] Many authors have also examined the particular formulations and assumptions of the original models.…”

Section: Continuum Modelsmentioning

confidence: 99%

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

Pickering

2013

ISIJ Int.

146

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The macro-scale segregation of alloying elements during the casting continues to afflict the manufacturers of steel ingots, despite many decades of research into its prediction and elimination. Defects such as A-segregates are still commonplace, and components are regularly scrapped due to their presence, leading to increased economic and environmental costs. With the growth of the nuclear power industry, and the increased demands placed on new pressure vessels, it is now more important than ever that today's steel ingots are as chemically homogeneous as possible.This article briefly reviews the development of our current understanding of macrosegregation phenomena during the 20 th century, before going on to assess the latest developments in the field of macrosegregation modelling. The aim of the text is to highlight the shortcomings of applying contemporary macromodels to steel-ingot casting, and to suggest practical alternatives. In addition, the experimental characterisation of macrosegregation is explored, and a review of the various techniques currently available is presented.

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Section: Continuum Modelsmentioning

confidence: 99%

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

Pickering

2013

ISIJ Int.

146

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“…73 K s −1 (green dotted line in Figure 7). We are fully aware that R c is overestimated by the TTT representation (Xu et al, 2013). A TTT diagram has to be converted to a CCT diagram to calculate the critical cooling rate more exactly (Grange and Kiefer, 1941;Zhu et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

The TTT Curves of the Heterogeneous and Homogeneous Crystallization of Lithium Disilicate – A Stochastic Approach to Crystal Nucleation

Krüger

Deubener

2016

Front. Mater.

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The present study explores the temperature and time dependence of heterogeneous (HET) crystal nucleation in a lithium disilicate glass using the stochastic approach. In particular, a single lithium disilicate sample was repeatedly (284 runs) undercooled to 1173 K in a PtRh-crucible and the crystallization onset time during an isothermal hold was detected in each run. The statistical distribution of the times elapsed before crystallization is described by a first-order reaction with a HET crystal nucleation rate of

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“…In order to determine the critical cooling rate for a glass-forming material solidified from liquid state without crystallization, constructing a CCT curve instead of time-temperature-transformation (TTT) curve is more realistic [35]. Here, we used the additivity rule to relate the transformation behavior during continuous cooling with the isothermal transformation data calculated above.…”

Section: Calculation Of Time Reduced Temperature Transformation (Tmentioning

confidence: 99%

Simulation of the Continuous Casting and Cooling Behavior of Metallic Glasses

Pei

2017

Materials

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The development of melt spinning technique for preparation of metallic glasses was summarized. The limitations as well as restrictions of the melt spinning embodiments were also analyzed. As an improvement and variation of the melt spinning method, the vertical-type twin-roll casting (VTRC) process was discussed. As the thermal history experienced by the casting metals to a great extent determines the qualities of final products, cooling rate in the quenching process is believed to have a significant effect on glass formation. In order to estimate the ability to produce metallic glasses by VTRC method, temperature and flow phenomena of the melt in molten pool were computed, and cooling rates under different casting conditions were calculated with the simulation results. Considering the fluid character during casting process, the material derivative method based on continuum theory was adopted in the cooling rate calculation. Results show that the VTRC process has a good ability in continuous casting metallic glassy ribbons.

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Critical cooling rate for the glass formation of ferromagnetic Fe80P13C7 alloy

Cited by 10 publications

References 28 publications

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

The TTT Curves of the Heterogeneous and Homogeneous Crystallization of Lithium Disilicate – A Stochastic Approach to Crystal Nucleation

Simulation of the Continuous Casting and Cooling Behavior of Metallic Glasses

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