A model to calculate surface tension of commercial alloys

Su, Yuchu; Mills, Kenneth C.; Dinsdale, Alan

doi:10.1007/s10853-005-1930-y

Cited by 28 publications

(10 citation statements)

References 7 publications

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“…For comparison, the literature values of the surface tension of similar composition alloys are also exhibited. [3][4][5][6] Uncertainties of the measurement plot were calculated based on the GUM, 18) in which the coverage factor of kp=2 was selected. The detail of the calculation for the uncertainties will be described in the next section.…”

Section: Resultsmentioning

confidence: 99%

“…Because a high temperature measurement is achieved by an oscillating droplet method using EML, the boomerang shape temperature dependence of the surface tension is confirmed in this study. Figure 4 shows the surface tension of molten SUS316 stainless steel under a flow condition of Ar-He-5 vol.%H2 gas (□) and Ar-He gas (▲) together with the literature data 5,6) for similar composition alloys. The surface tension of molten SUS316 stainless steel was measured over the wide temperature ranges of 510 K and 360 K including the undercooling region under the flow condition of Ar-He-5 vol.%H2 and Ar-He gases, respectively.…”

Section: Surface Tension Of Molten Sus 304 Stainless Steelmentioning

confidence: 99%

“…[2][3][4][5][6][7][8] Sulfur and oxygen are usually contained in stainless steels as an impurity. Since oxygen can also exist in an atmosphere as a gas phase, the surface tension of molten stainless steel is expected to be affected by the oxygen partial pressure, , of atmospheric gas as in the case of other molten metals such as iron and nickel.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Oxygen Partial Pressure on Surface Tension of Molten Type 304 and 316 Stainless Steels Measured by Oscillating Droplet Method Using Electromagnetic Levitation

2014

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Surface tension of molten SUS304 and SUS316 stainless steels was measured by an oscillating droplet method using electromagnetic levitation furnace to investigate the influence of oxygen partial pressure, , of atmosphere on surface tension and its temperature coefficient. We successfully measured the surface tension of molten stainless steels over a wide temperature range including an undercooling condition under Ar-He-5 vol.%H2 and Ar-He mixed gases. Although the surface tension of molten SUS304 stainless steel decreased with increasing temperature under the Ar-He-5 vol.%H2 mixed gas, the surface tension showed a boomerang temperature dependence when was fixed at 10 -2 Pa under the Ar-He mixed gas; and surface tension increased and then decreased with increasing temperature. When the surface tension of molten SUS316 stainless steel was measured under the Ar-He-5 vol.%H2 and Ar-He mixed gases, the surface tension increased with increasing temperature regardless of the atmospheric gas due to the large sulfur content. The uncertainty of the measurement was evaluated as less than 5% in this study.

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Section: Resultsmentioning

confidence: 99%

Section: Surface Tension Of Molten Sus 304 Stainless Steelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Oxygen Partial Pressure on Surface Tension of Molten Type 304 and 316 Stainless Steels Measured by Oscillating Droplet Method Using Electromagnetic Levitation

2014

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“…Measurements of the surface tension of industrial steels as a function of temperature containing surface active elements are further complicated by the temperature dependent solubility of these elements. Models of the surface tension of commercial alloys have been developed by Mills et al12. Mills has calculated the effect of S additions on the temperature dependence13, 14 of the surface tension of Fe‐alloys taking into account the temperature dependent solubility of S in Fe.…”

Section: Introductionmentioning

confidence: 99%

Time Dependent Effects in Surface Tension Measurements of an Industrial Fe‐alloy

Wunderlich

Fecht

Schick

et al. 2011

steel research int.

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The surface tension of an industrial FeC-alloy containing Si, Mn and S in the few atomic per cent range was measured by the oscillating drop method in ground based electromagnetic levitation and under reduced gravity conditions on board a parabolic flight. The results from the parabolic flight exhibited a large variation between different heating cycles and a discrepancy with the ground based experiments with regard to the value of the surface tension at the liquidus temperature and the temperature coefficient. The variation of the surface tension temperature coefficient is interpreted as resulting from the loss of volatile surface active components such as S and Si in subsequent heating cycles. The results demonstrate the importance of the time scale of the measurement and ambient atmosphere for surface tension measurements of industrial alloys containing volatile surface active components. For comparison with the experimental values the surface tension and segregation were modelled using different models. As a result of the analysis, the surface tension as a function of temperature best representing the starting industrial alloy is obtained as s(T) ¼ 1.52-1.53 10 -4 (T-1752K) Nm -1 .

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“…The ideas underlying genetics, metallurgical heredity respectively, appeared in more than 50 years ago in different references [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In the broad metallurgical sense heredity is the description of those properties of metals that are not only based on status, but depend on their past [3].…”

mentioning

confidence: 99%

Mathematical Processing and Structural Explanation of Surface Tension Polythermal Diagram Reached Out to Achieve Critical Temperature of Thermo-time Treatment for a Ni Based Superalloy

Rucai¹,

Constantin²,

Ciucă³

et al. 2019

Rev. Chim.

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Thermo-Time Treatment of multicomponent melting can be foreshadowed by the polythermal diagrams analysis of main physical and chemical properties, which are considered for this purpose as structural-sensitive properties: viscosity, surface tension, density or electrical conductivity [1]. Critical temperature (Tcr), i.e. temperature at which or around which, must run Thermo-Time Treatmenthas been experimentally marked by a sudden and seemingly contradictory deviation on polythermal diagrams of surface tension, s(T), reached out at cooling process for Ni base studied superalloy (MSRR 7045). A possible mathematical processing of it, is given by interpolation curves of the surface tensiondependence on temperature.

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A model to calculate surface tension of commercial alloys

Cited by 28 publications

References 7 publications

Influence of Oxygen Partial Pressure on Surface Tension of Molten Type 304 and 316 Stainless Steels Measured by Oscillating Droplet Method Using Electromagnetic Levitation

Influence of Oxygen Partial Pressure on Surface Tension of Molten Type 304 and 316 Stainless Steels Measured by Oscillating Droplet Method Using Electromagnetic Levitation

Time Dependent Effects in Surface Tension Measurements of an Industrial Fe‐alloy

Mathematical Processing and Structural Explanation of Surface Tension Polythermal Diagram Reached Out to Achieve Critical Temperature of Thermo-time Treatment for a Ni Based Superalloy

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