Abstract
The purpose of this work was to explore the differences in solidification kinetics between unmodified and Sr modified eutectic Al-Si alloy as revealed by Fourier Thermal Analysis (FTA) and grain-growth kinetics characterization. Thermal analysis were performed in cylindrical stainless steel cups coated with a thin layer of boron nitride, using two type-K thermocouples connected to a data acquisition system. Grain growth kinetics characterization was carried out using solid fraction evolution and grain density data. FTA results for the non modified and modified alloys suggest that there are changes in the solidification rate during eutectic nucleation followed, during growth, by similar solidification rate evolutions, suggesting that this parameter is governed principally by the heat extraction conditions. On the other hand the change of the grain growth parameters estimated for the experimental probes suggest that the presence of Sr may modify the relationship between grain growth rate and undercooling in eutectic Al-Si.
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References
J. E. Gruzleski, The Treatment of Liquid Aluminum-Silicon Alloys, pp.25–55, American Foundrymens Society Inc., USA (1990).
A. K. Dahle, K. Nogita, J. W. Zindel, S. D. McDonald, and L. M. Hogan, Metall. Mater. Trans. A 32, 949 (2001).
Y. H. Cho, H. C. Lee, K. H. Oh, and A. K. Dahle, Metall. Mater. Trans. A 39, 2435 (2008).
S. Z. Lu and A. Hellawell, Metall. Trans. A 18, 1721 (1987).
Y. H. Cho and A. K. Dahle, Metall. Mater. Trans. A 40, 1011 (2009).
A. Çetin and A. Kalkanli, J. Mater. Process. Tech. 209, 4795 (2009).
J. W. Gibbs and P. F. Mendez, Scripta Mater. 58, 699 (2008).
C. Gonzalez-Rivera, B. Campillo, M. Castro, M. Herrera, and J. Juarez-Islas, Mater. Sci. Eng. A 279, 149 (2000).
C. González, H. Cruz, A. García, and J. Juarez, J. Mater. Eng. Perform. 8, 103 (1999).
W. Kapturkiewicz, A. Burbielko, and H. F. Lopez, AFS Trans. 101, 505 (1993).
J. O. Barlow and D. M. Stefanescu, AFS Trans. 105, 339 (1997).
D. Emadi and L. Whiting, AFS Trans. 110, 285 (2002).
C. Degand, D. M. Stefanescu, and G. Laslaz, Proc. Int. Symp. On Advanced Materials and Technology for the 21st Century, (eds. I. Ohnaka and D.M. Stefanescu), Honolulu, HI, p.55, TMS, Warrendale, PA, USA (1995).
A. Dioszegi and I. L. Svensson, Int. J. Cast Metal Res. 18, 41 (2005).
D. M. Stefanescu. Science and Engineering of Casting Solidification, 2nd Ed, pp.19, 217, Springer Science New York, USA (2009).
Y. H. Cho, H. C. Lee, K. H. Oh, and A. K. Dahle, Metall. Mater. Trans. A 39, 2435 (2008).
S. D. McDonald, A. K. Dahle, J. A. Taylor, and D. H. St John, Metall. Mater. Trans. A 35, 1829 (2004).
S. D. McDonald, K. Tsujimoto, K. Yasuda, and A. K. Dahle, J. Electron Microsc. 53, 361 (2004).
C. A. Santos, J. M. V Quaresma, and A. Garcia, J. Alloy. Compd. 319, 174 (2001).
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Aparicio, R., Barrera, G., Trapaga, G. et al. Solidification kinetics of a near eutectic Al-Si alloy, unmodified and modified with Sr. Met. Mater. Int. 19, 707–715 (2013). https://doi.org/10.1007/s12540-013-4010-x
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DOI: https://doi.org/10.1007/s12540-013-4010-x