Paper Titles
The Effect of Superheat on Micro- and Macrosegregation and Crack Formation in the Continuous Casting of Low-Alloyed Copper
p.549
Simulation of High Pressure Die Casting Solidification
p.555
Experimental Work on Possibilities to Predict Casting Defects in LPDC Brass Castings
p.561
Chemical Diffusion Experiments in AlNiCe-Melts
p.567
Surface Tension Measurements of Industrial Alloys
p.573
Solid-Solid Phase Transformations in Aluminium Alloys Described by a Multiphase-Field Model
p.579
Measurement of the Kinetics of Thermal Effects during Phase Transformations in ADI
p.585
Thermodynamic Properties of CMSX-4 Superalloy: Results from the ThermoLab Project
p.591
Thermo-Mechanical Analysis of Directional Crystallisation of Multi-Crystalline Silicon Ingots
p.597

Surface Tension Measurements of Industrial Alloys

Article Preview

Abstract:

Industrial alloys are generally multi-component systems with volatile and highly reactive components. Consequently, their processing in the liquid state requires special precautions. Therefore, an existing electromagnetic-levitation device with a high-vacuum chamber, designed for surface tension measurements, was modified and improved. For the measurements of the surface tensions with the help of the oscillating drop technique the temperatures and the video sequences of the levitated, molten alloy were recorded without contact by pyrometer and by high-speed camera, respectively. This method yields the frequencies of the surface oscillations of the sample around the equilibrium shape and - using the modified Rayleigh law - eventually the values of the surface tension. With the help of this method two commercial industrial steels were processed in the new EML-apparatus for ESA`s Thermolab project [1]. The results of these measurements are presented and discussed

You might also be interested in these eBooks
Solidification and Gravity IV View Preview

Info:

Periodical:

Materials Science Forum (Volume 508)

Pages:

573-578

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.508.573

Citation:

Cite this paper

Online since:

March 2006

Authors:

Frank Schmidt-Hohagen, Ivan Egry

Keywords:

Electromagnetic Levitation, Industrial Alloys, Liquid Metal, Oscillating Drop, Rayleigh Law, Surface Oscillations, Surface Tension, Undercooling

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] H. -J. Fecht, R.K. Wunderlich et al.: High-precision thermophysical data of liquid metals for modelling of industrial solidification processes: ThermoLab Final Report (2003).

DOI: 10.1515/htmp.2008.27.6.385

Google Scholar

[2] Lord Rayleigh : Proc. Roy. Soc., Vol. 29 (1879), p.71.

Google Scholar

[3] E. Schwartz, S. Sauerland, J. Szekely, I. Egry: in Proc. Containerless Processing: Techniques and applications, Ed. by W. Hofmeister and R. Schiffman; The Min., Met. and Mat. Soc. (1993), p.57.

Google Scholar

[4] D. L. Cummings and D. A. Blackburn: J. Fluid Mech., Vol. 224 (1991), p.395.

Google Scholar

[5] R.K. Wunderlich : private communication ( 2004).

Google Scholar

[6] K. C. Mills, H. -J. Fecht, R.K. Wunderlich : ThermoLab Newsletter 3 (2003).

Google Scholar

[7] S. Sauerland, K. Eckler, I. Egry : J. Mat. Sci., Vol. 11 (1992), p.330.

Google Scholar

[8] S. Sauerland, R. F. Brooks, I. Egry and K. C. Mills: in Proc. Containerless Processing: Techniques and applications, Ed. by W. Hofmeister and R. Schiffman; The Min., Met. and Mat. Soc. (1993), p.65.

Google Scholar