Surface tension and viscosity–temperature dependence and mutual causal correlation in tin-silver alloys

AbstractW360 is a hot work tool steel produced by voestalpine BÖHLER Edelstahl GmbH & Co KG, a special steel producer located in Styria, Austria. Surface tension and density of liquid W360 were studied as a function of temperature in a non-contact, containerless fashion using the oscillating drop method inside an electromagnetic levitation setup. For both, surface tension and density, a linear model was adapted to present the temperature dependence of these measures, including values for the uncertainties of the fit parameters found. The data obtained are compared to pure iron (with 91 wt% the main component of W360), showing an overlap for the liquid density while there is a significant difference in surface tension (− 5.8 % at the melting temperature of pure iron of 1811 K).

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Temperature Dependence of Surface Tension in Associated Liquids

Journal of the Physical Society of Japan ◽

10.1143/jpsj.28.806 ◽

1970 ◽

Vol 28 (3) ◽

pp. 806-806 ◽

Cited By ~ 3

Author(s):

Narsingh Dass ◽

OM Singh

Keyword(s):

Surface Tension ◽

Temperature Dependence

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Density and Surface Tension of Fe-Cu Melts

Materials Science Forum ◽

10.4028/www.scientific.net/msf.992.545 ◽

2020 ◽

Vol 992 ◽

pp. 545-550

Author(s):

Vladimir V. Vyukhin ◽

O.A. Chikova ◽

Ksenya Yu. Shmakova

Keyword(s):

Surface Tension ◽

Temperature Dependence ◽

Cast Steel ◽

Liquid Alloys ◽

Humid Atmosphere ◽

Damping Characteristics ◽

Metal Melts ◽

Cu Alloys ◽

Two Phases ◽

Large Machine

Fe-Cu alloys are used as structural materials for manufacture of large machine parts subjected to shock loads. Fe-Cu alloys have a higher corrosion resistance in a humid atmosphere and in salt solutions than cast steel. Fe-Cu alloys have high enough damping characteristics. Upon cooling the Fe-Cu melts is stratified into two phases before crystallization which in field of gravity are separated by density. It is possible to suppress delamination and obtain a material with structure of a “frozen emulsion” by heating melt to the temperature T* determined for each composition by a specific way. In this paper, we studied surface tension of liquid alloys of Fe-1wt.% Cu, Fe-20wt.% Cu, and Fe-30wt.%Cu in order to determine the temperature T*. For the melt of Fe-20wt.% Cu value T*=1670°C is highest. It is confirmed by results of measuring temperature dependence of surface tension. Temperature dependence of the surface tension Fe-Cu melts is characterized by a positive value of the temperature coefficient of surface tension dσ/dT which is abnormal for metal melts. Experimental data on the density, the surface tension of Fe-Cu liquid alloys have of independent metrological importance for practical foundry.

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