Quantification of the microconstituents formed during solidification by the Newton thermal analysis method

Cruz, Homero Reyes de la; González, César; Juárez, A.; Herrera, M.; Juárez, José Antonio Caballero

doi:10.1016/j.jmatprotec.2006.03.152

Cited by 40 publications

(22 citation statements)

References 3 publications

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“…[8]. The sources of variation in the single phase regions include thermocouple measurement noise or deviations in the cooling behavior from ideal convection.…”

Section: Discussionmentioning

confidence: 99%

“…Attempts have been made to use these methods to measure the amount of a phase formed [8,9] ; however, the limitations imposed by the use of the graphical technique have led these methods to be focused on constituents formed during solidification, whereas the proposed method is focused on phase fraction determination for transformations that occur in the solid state.…”

Section: Introductionmentioning

confidence: 99%

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Cooling Curve Analysis to Determine Phase Fractions in Solid-State Precipitation Reactions

Gibbs

Kaufman

Hackenberg

et al. 2010

Metall Mater Trans A

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This work presents a new method of cooling curve analysis to make in situ measurements of the amount of precipitate formed in solid-state phase transformations. The presented technique is based on a first-principles analysis of thermodynamics and heat flow to develop equations that relate cooling curve data to the amount transformed. The precipitation of Ag 2 Al in a binary Al-Ag alloy was examined both as a practical example of this technique and to obtain metallographic measurements of the amount of precipitation for comparison purposes.

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“…[8]. The sources of variation in the single phase regions include thermocouple measurement noise or deviations in the cooling behavior from ideal convection.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cooling Curve Analysis to Determine Phase Fractions in Solid-State Precipitation Reactions

Gibbs

Kaufman

Hackenberg

et al. 2010

Metall Mater Trans A

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“…Thus, using experimentally available data, that includes the cooling curve of the metal sample, the weights of the metal and the mold, the room temperature T 0 , and In order to know which parts of the cooling curves will be used to obtain h, the time of start and end of solidification, tss and tes respectively are determined on the first derivative of the cooling curve using the conventional criteria used by NTA method [3]. In this way the cooling curve of the sample is divided in three sequential sections:…”

Section: Description Of the Methodsmentioning

confidence: 99%

“…In all cases the curves shows three cooling stages. A The first derivative of the metal cooling curve was calculatedin order to identify the times of start, tss and end,tes of solidification, by applying the conventional criteria reported for the NTA [3]. Figure 2 shows a graphical example of this determination in the case of one of the zinc samples.…”

Section: Methodsmentioning

confidence: 99%

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Cooling Curve Analysis Method using a Simplified Energy Balance

González‐Rivera

Villeda

Argáez

2018

KEG

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In this work is described a new cooling curve analysis method focused on the experimental determination of the latent heat of phase changes and phase transformation kinetics.The method analyses the cooling process of a metallic sample, initially liquid that is contained into a cylindrical metallic mold, both of known weight, thermally isolated at its top and bottom. The method is based on a simplified energy balance associated with the experimental measurement of the temperature change of the sample during its cooling process. The method was applied experimentally to zinc and tin of commercial purity, initially liquids and contained into stainless steel molds in order to determine its ability to determine the latent heat of solidification. In order to validate the method, the obtained values of latent heat were compared with the values reported in thermochemical databases. The obtained results suggest that this method can be used to characterize the solidification of metals.

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Control of the phase composition and morphology of a Cu‐Sb eutectic alloy via liquid‐liquid structure transition

Huang

2012

Cryst. Res. Technol.

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The current paper focuses on the solidification characteristics of a Cu‐Sb eutectic alloy in its different liquid states. Liquid alloy resistivity‐temperature patterns suggest an irreversible temperature‐induced liquid‐liquid structure transition (TI‐LLST), and a reversible TI‐LLST occurred during the heating‐cooling runs. A set of solidification experiments was conducted based on the results. The irreversible TI‐LLST caused an enhanced solidification undercooling, increased solidification rate, refined regular eutectic morphologies, and absence of a pre‐eutectic Cu2Sb phase. The reversible TI‐LLST resulted in different phase compositions and eutectic structures. The mechanisms behind these transitions are also briefly discussed.

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Quantification of the microconstituents formed during solidification by the Newton thermal analysis method

Cited by 40 publications

References 3 publications

Cooling Curve Analysis to Determine Phase Fractions in Solid-State Precipitation Reactions

Cooling Curve Analysis to Determine Phase Fractions in Solid-State Precipitation Reactions

Cooling Curve Analysis Method using a Simplified Energy Balance

Control of the phase composition and morphology of a Cu‐Sb eutectic alloy via liquid‐liquid structure transition

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