In Situ Optical Determination of Fraction Solid of Al-Si-Mg Alloys

Sonja Steinbach; Lorenz Ratke

doi:10.4028/www.scientific.net/MSF.508.491

Paper Titles

Investigation on the Morphological Instability during Directional Solidification of a Transparent Alloy during Sounding Rocket Flights
p.463

The Effect of Fluid Convection on Microstructures of Directionally Solidified Castings
p.473

Single Crystal Growth – New Techniques on Old Base
p.479

Experimental Performance within the SCA Prototype Test 1 Using ESA`s Solidification and Quench Furnace (MSL-SQF) on Ground
p.485

In Situ Optical Determination of Fraction Solid of Al-Si-Mg Alloys
p.491

Mesh-Free Simulation of Transport Phenomena in Continuous Castings of Aluminium Alloys
p.497

The Effect of Fluid Flow on Heat Transfer and Shell Growth in Continuous Casting of Copper
p.503

New Algorithm to Calculate Liquid – Solid Shrinkage and Graphite Expansion
p.509

Melt Flow and Macrosegregation in DC Casting of Binary Aluminum Alloys
p.515

HomeMaterials Science ForumMaterials Science Forum Vol. 508In Situ Optical Determination of Fraction Solid of...

In Situ Optical Determination of Fraction Solid of Al-Si-Mg Alloys

Abstract:

In this paper we report on a new optical technique to measure in situ the fraction solid during solidification. The technique utilizes the extreme properties of silica aerogels, being optically transparent in the visible and near infrared. From measured brightness time profiles the fraction solid can be derived using a suitable theoretical approach. The technique is tested on a technical AlSiMg alloy (A357) solidified directionally in the furnace facility Artemis. The results are compared with the well known theoretical expressions of the lever rule and the Scheil relation. The measured fraction solid as a function of temperature agrees well with model of Scheil which shows the capabilities of the new technique.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volume 508)

Pages:

491-496

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.508.491

Citation:

Cite this paper

Online since:

March 2006

Authors:

Sonja Steinbach, Lorenz Ratke

Keywords:

Aluminium Alloy, Fraction Solid, Image Analysis, Optical Spectroscopy, Solidification

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] D.J. Fisher, W. Kurz: Fundamentals of Solidification (Trans Tech Publications Ltd., Switzerland 1989).

Google Scholar

[2] M.C. Flemings: Solidification processing (McGraw-Hill Book Company, New York 1974).

Google Scholar

[3] C. Beckermann: Proc. Merton C. Flemings Symposium on Solidification and Materials Processing, R. Abbashian, H. Brody, A. Mortenson, editors, TMS, Warrendale, PA (2001), pp.297-310.

Google Scholar

[4] O. Pompe, M. Rettenmayr: J. Cryst. Growth Vol. 192 (1998), p.300 T. Kraft, H.E. Exner, M. Rettenmayr: Model Simul. Mater. Sci. Eng. Vol. 4 (1996), p.161.

Google Scholar

[5] H. Diepers, A. Weiss, I. Steinbach, G. Zimmermann: Modelling of Casting, Welding and Advanced Solidification Processes X: Proc. of the Tenth Int. Conf. (UES, D. Stefanescu, J. Warren, Minerals, Metals and Materials Society, TMS, 2003).

Google Scholar

[6] S. Ahrweiler, L. Ratke, J. Lacaze: J. Adv. Eng. Mater. Vol. 5 (2003), p.178.

Google Scholar

[7] J. Alkemper, S. Sous, C. Stöcker, L. Ratke: J. Cryst. Growth, Vol. 191 (1998), pp.252-260.

Google Scholar

[8] J. Fricke (Ed. ): Proceedings of the Third International Symposium on Aerogels 3, J. NonCrystal. Solids Vol. 145 (1992), pp.1-258.

Google Scholar

[9] P. Scheurpflug, M. Hauck, J. Fricke, ibidem, p.196.

Google Scholar

[10] P.H. Tewari, A.J. Hunt, J.G. Lieber, K. Lufftus: Aerogels (J. Fricke (Ed. ), Springer Verlag, Berlin, 142, 1985).

Google Scholar

[11] A. Kneubühl: Repetitorium der Physik (Stuttgart, BG Teubner 1994).

Google Scholar