Influence of Cooling Rate on the Size of the Precipitates and Thermal Characteristic of Al-Si Cast Alloys


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In this work effect of cooling rate on the size of the grains, SDAS, β phases and thermal characteristic results of Al-Si cast alloys have been described. The solidification process was studied using the cooling and crystallization curve at cooling rate ranging from 0,1 °Cs-1 up to 1 °Cs-1. The main observation made from this work was that when cooling rate is increased the aluminum dendrites nucleation temperature and solid fraction at the dendrite coherency point increases, which implies that mass feeding is extended. In addition to that, it was observed that solidus temperature and size of the β phases decreases when cooling rate increases. Investigations were showed, that the thermal modification could be quantitatively assessed by analysis of the crystallization curve.



Advanced Materials Research (Volumes 15-17)

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer and C. Ravindran




R. Maniara et al., "Influence of Cooling Rate on the Size of the Precipitates and Thermal Characteristic of Al-Si Cast Alloys", Advanced Materials Research, Vols. 15-17, pp. 59-64, 2007

Online since:

February 2006




[1] R. MacKay, M. Durdjevic, J. Sokolowski: The effect of cooling rate on the fraction solid of the metallurgical reaction in the 319 alloy, AFS Transaction, (2000).

[2] C. H Cáceres, M.B. Djurdjevic, T.J. Stockwell, J.H. Sokolowski: Cast Al: The effect of cu content on the level of microporosity in Al-Si-Cu-Mg casting alloys, Scripta Materiala, (1999).


[3] J.M. Boileau, J.W. Zindel and J.E. Allison: The effect of solidification time on the mechanical properties in a cast A356-T6 aluminum alloy, Society of Automotive Engineers, Inc., (1997).


[4] A.M. Samuel, A. Gotmare, F.H. Samuel: Effect of solidification rate and metal feedability on porosity and SiC/Al2O3 particle distributing in an Al-Si-Mg (359) alloy, composite Science and Technology, (1994).


[5] S. Pietrowski: Krystalizacja siluminów w aspekcie oceny metodą ATD, Przegląd Odlewnictwa, Warszawa, (1994).

[6] S. Pietrowski, R. Władysiak: Estimation of modification and crystallization effect of hypereutectoid silumin by ATD method, International Foundry Conference Solidification and Crystallization of Metals, Gliwce, (1992).

[7] J. Sakwa: Ocena zmian procesu krystalizacji stopów aluminium pod wpływem dodatków stopowych i domieszek, za pomocą analizy termicznej i derywacyjnej, Prace Instytutu Odlewnictwa Politechniki Śląskiej, Gliwice, (1989).

[8] L. Backerud, E. Król, J. Tamminen: Solidification characteristics of aluminum alloys, Vol. 1, Universitetsforlaget, Oslo (1986).

[9] L. Backerud, G. Chai J. Tamminen: Solidification characteristics of aluminum alloys, Vol. 2. AFS (1992).

[10] L. Backerud, G. Chai: Solidification characteristics of aluminum alloys, Vol. 3, AFS (1992).

[11] Z. Poniewierski: Krystalizacjia struktura i własności siluminów, WNT, Warszawa (1989).

[12] American Foundry Society, (AFS): Chart for microstructure control in hypoeutectic aluminum silicon alloys, American Foundry Society, Inc., Des Plaines, Illinois.

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