Effect of Titanium and Strontium Addition on the Fluidity of A319 and A356 Aluminum Alloys

Abstract:

A series of tests have been conducted to study the effect of titanium and strontium on the fluidity of liquid A319 and A356 aluminum alloys. The increase of titanium enhances the fluidity of the A319 liquid alloy due to its high potential to refine the grain size because the presence of particles increases the solid nucleation rate. For the alloy A356, the fluidity index increases with the increase of strontium, eliminating the occurrence of cold joint defects. Therefore, it is concluded that titanium and strontium enhance the fluidity of these liquid aluminum alloys. It is expected that cast defects will be reduced. Care has to be taken, as a very fluid metal can also be harmful.

• Periodical: Materials Science Forum (Volume 509)
• Pages: 159-164
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.509.159
• Online since: March 2006
• Authors: Samuel Sánchez, E. Velasco, Patricia del C. Zambrano, J.L. Cavazos
• Keywords: Aluminium Alloy, Eutectic, Fluidity, Strontium, Titanium (Ti)

References

[1] G. Ruíz, R. Torres, R. Colás and S. Valtierra: Industrial Processes for Removing Contents of Fe in A319 alloys, Proc. Aluminum Congress (Foundry Mexican Society, A.C. North Region, Monterrey, México, Oct. 1999).

[2] J. Schaffer, A. Saxena, S. Antolovich, T. Sanders and S. Warner: Science and Design of Engineering Materials (CECSA, México, D.F. 2000).

[3] L. Bacckerud, G. Chai and J. Tamminen: Solidification Characteristics of Aluminum Alloys, Vol. 2: Foundry Alloys p.315 (Ed. AFS/Skanaluminum, USA 1990).

[4] J.E. Hatch: Aluminum: Properties and Physical Metallurgy (ASM International, Metals Park, OH, USA 1984).

[5] D. Ragone, C. M. Adams and H. F. Taylor: Factors Affecting the Fluidity of Metals (Ed. Ann Arbor: University of Michigan, Engineering Industry College Program, USA 1955).

[6] L.M. Berlanga: Review of Degasified Process for Aluminum Alloys, Proc. Aluminum Congress (Mexican Society of Foundries, A.C. North Region, Monterrey, Mexico 1999).

[7] N. Tenekedjiev, H. Mulazimoglu, B. Colsset and J. E. Gruzlesky: Microstructures and Thermal Analysis of Strontium-Treated Aluminum-Silicon Alloys (Amer. Foundrymen´s Soc., Inc., Schaumburg, IL, USA 1989). Schaumburg IL.

[8] I. J. Polmear: Mater. Sci. Technol. Vol. 10 (1994) p.1.

[9] A. Luo and M. O. Pekguleryuz: J. Mater. Sci. Vol. 29 (1994) p.5259.

[10] A. Housh and B. Mikucki: Metals Handbook, 10th ed., Vol. 2 p.455 (ASM International, Materials Park, OH, USA 1990).