Analysis of the Antimony and Strontium Cross-Effects in Al-Si Foundry Alloys

Abstract:

In this work we show the effect of various concentrations of strontium and antimony on the level of modification in the Al-Si alloy. The scale of the modification rate was determined in two ways: thermal analysis was performed and the images of the samples. The eutectic temperature registered during the analysis were compared to the eutectic temperature of the unmodified alloy and on the basis of them was determined which samples are registered as modified, which are not. On the basis of the results of the cooling curves the partially modified category was introduced, if the ΔT value is less than 9°C and more than 7.5°C. The samples made of the alloys were examined with a computer image analysis and the samples were grouped on the basis of the size of the eutectic silicon phases. The aim of our research work was the examination of cross-effects of strontium and antimony.

• Periodical: Materials Science Forum (Volumes 790-791)
• Pages: 464-469
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.790-791.464
• Online since: May 2014
• Authors: Monika Tokár*, György Fegyverneki, Valéria Mertinger
• Keywords: Antimony, Image Analysis, Silicon Modification, Strontium, Thermal Analysis

References

[1] J.G. Kaufman, E.L. Rooy: Aluminium alloy castings properties, processes and applications, ASM International, ISBN: 0-87170-803-5, (2005).

[2] M. Djurdjevic, H. Jiang, J. Sokolowski: On-line prediction of aluminium-silicon eutectic modification level using thermal analysis, Materials Characterization - Elsevier, 46(2001)31-38.

DOI: 10.1016/s1044-5803(00)00090-5

[3] M. Garant, G. Laslaz, P. Meyer, P.H. Gurerin, R. Adam: State of the art use of Sb-Na and modified Al-Si casting alloy, AFS Transactions, pp.821-832(1992).

[4] J. Espinoza-Cuadra, P. Gallegos-Acevedo, H. Mancha-Molinar, A. Picado: Effect of Sr and solidification conditions on characteristics of intermetallic in Al-Si 319 industrial alloys, Materials and Design, 31(2010)343-356.

DOI: 10.1016/j.matdes.2009.06.017

[5] A.K. Dahle, K. Nogita, S.D. McDonald, C. Dinnis, L. Luc: Eutectic modification and microstructure development in Al-Si alloys, Materials Science and Engineering, A413-414(2005)243-248.

DOI: 10.1016/j.msea.2005.09.055

[6] N. Fatahalla, M. Hazif, M. Abdulkhalek: Effect of microstructure on the mechanical properties and fracture of commercial hypoeutectis Al-Si alloy modified with Na, Sb and Sr, Journal of Materials Science, 34(1999)3555-3564.

DOI: 10.1023/a:1004626425326

[7] C. Xiang, G. Hui-yuan, L. Yan-xiang: Assessment of modification level of hypoeutectic Al-Si alloys by pattern recognition of cooling curves, China Foundry, Vol. 2(4), pp.246-253, (2005).

[8] M.F. Ibrahim, E. Samuel, A.M.A. Mohamed, A.M. Samuel, F.H. Samuel: Mechanical properties of Al-Si-Cu-Mg cast alloys: effects of tramp elements, AFS Transaction, Schaumburg, (2011) 11-070.

DOI: 10.1007/s40962-022-00813-w

[9] Z. Gácsi: The application of digital image processing for materials science, Materials Science Forum, Vol. 414-415, pp.213-220., (2003).

DOI: 10.4028/www.scientific.net/msf.414-415.213