Abstract
The nature of liquid-solid phase equilibria in the Al-rich corner of the Al-Si-Ti system are determined by drawing three isothermal sections at 620, 680 and 727 °C. The solubility of Ti in Al-Si liquids is determined for four different compositions (0, 9, 13 and 18 at.%Si) at temperature below 800 °C. Combination of the two sets of experimental results leads to an attempt of liquidus projection. The primary crystallization surface of Al3Ti is found to extend up to 9.5 at.%Si in the liquid phase at 620 °C and 11 at.%Si at 727 °C. The solubility of Ti is found to be not significantly dependent on the Si content of the liquid. From DSC measurements and deduction on microstructure, the last invariant reaction of the solidification path is found to be quasi-peritectic: \({\text{L}} + \uptau_{1} - {\text{Ti}}_{7} {\text{Al}}_{5} {\text{Si}}_{12} \Leftrightarrow {\text{Al}} + {\text{Si}} .\)
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M. Easton and D. Stjohn, Grain Refinement of Aluminum Alloys: Part I. The Nucleant and Solute Paradigms—A Review of the Literature, Metall. Mater. Trans. A, 1999, 30(6), p 1613-1623
M. Easton and D. StJohn, Grain Refinement of Aluminum Alloys: Part II. Confirmation of, and a Mechanism for, the Solute Paradigm, Metall. Mater. Trans. A, 1999, 30(6), p 1625-1633
L. Arnberg, L. Bäckerud, and H. Klang, Intermetallic Particles in Al-Ti-B-Type Master Alloys for Grain Refinement of Aluminium, Met. Technol., 1972, 9(1), p 7-13
B.S. Murty, S.A. Kori, and M. Chakraborty, Grain Refinement of Aluminium and Its Alloys by Heterogeneous Nucleation and Alloying, Int. Mater. Rev., 2002, 47(1), p 3-29
M. Abdel-Reihim, N. Hess, W. Reif, and M.E.J. Birch, Effect of Solute Content on the Grain Refinement of Binary Alloys, J. Mater. Sci., 1987, 22(1), p 213-218
M. Johnsson, Influence of Si and Fe on the Grain-Refinement of Aluminum, Z. Metall., 1994, 85(11), p 781-785
J.A. Spittle, J.M. Keeble, and M.A. Meshhedani, The Grain Refinement of Al-Si Foundry Alloys, Light Metals, R. Huglen, Ed., TMS, Warrendale, PA, 1997, p 795-800
T.E. Quested, A.T. Dinsdale, and A.L. Greer, Thermodynamic Evidence for a Poisoning Mechanism in the Al-Si-Ti System, Mater. Sci. Technol., 2006, 22(6), p 1126-1134
P. Perrot, The Al-Si-Ti System, Ternary Alloys, G. Petzow and G. Effenberg, Ed., VCH, Weinheim, 1988, p 557
A. Zakharov, I. Guldin, A. Arnold, and Y. Matsenko, Phase-Equilibria in the Al-Si-Ti System in the 10-14 Percent Si and 0-6 Percent Ti Concentration Range, Russ. Metall., 1998, 4, p 185-189
M. Peronnet, F. Barbeau, F. Bosselet, J.C. Viala, and J. Bouix, Comportement Chimique du Titane Dans un Alliage Liquide Aluminium-Silicium, J. Phys. IV, 1999, 9(PR4), p 6
S. Liu, F. Weitzer, J.C. Schuster, N. Krendelsberger, and Y. Du, On the Reaction Scheme and Liquidus Surface in the Ternary System Al-Si-Ti, Int. J. Mater. Res., 2008, 99(7), p 705-711
O. Shob, H. Nowotny, and F. Benezovsky, The Ternary System (Titanium, Zirconium, Hafnium) Aluminum-Silicon, Planseeber. Pulvermetall., 1962, 10, p 65-71
S. Gupta, Intermetallic Compounds in Diffusion Couples of Ti with an Al-Si Eutectic Alloy, Mater. Charact., 2002, 49(4), p 321-330
M. Bulanova, L. Tretyachenko, M. Golovkova, and K. Meleshevich, Phase Equilibria in the α-Ti-Al-Si Region of the Ti-Si-Al System, J. Phase Equilib. Diffus., 2004, 25(3), p 209-229
W.V. Youdelis, Calculated Al-Ti-Si Phase Diagram and Interpretation of Grain Refinement Results, Met. Sci., 1978, 12(8), p 363-366
J. Gröbner, D. Mirković, and R. Schmid-Fetzer, Thermodynamic Aspects of Grain Refinement of Al-Si Alloys Using Ti and B, Mater. Sci. Eng. A, 2005, 395(1-2), p 10-21
A. Raman and K. Schubert, The Constitution of Some Alloy Series Related to TiAl3. II. Investigations in Some T-Al-Si and T4…6-In Systems, Z. Metall., 1965, 56(1), p 44-52
T. Magnusson and L. Arnberg, Density and Solidification Shrinkage of Hypoeutectic Aluminum-Silicon Alloys, Metall. Mater. Trans. A, 2001, 32(10), p 2605-2613
J. Pouchou and F. Pichoir, Very High Elements x-Ray-Microanalysis—Recent Models of Quantification, J. Microsc. Spectrosc. Electron., 1986, 11(4), p 229-250
C.J. Smithells, W.F. Gale, and T.C. Totemeier, Smithells Metals Reference Book, Volume 1, 4th ed., Butterworths, London, 1967
C. Brukl, H. Nowotny, O. Schob, and F. Benesovsky, Die Kristallstruckturen von TiSi, Ti(Al, Si)2 und Mo(Al, Si)2, Monatsh. Chem., 1961, 92(3), p 781-788
O. Dezellus, B. Gardiola, and J. Andrieux, On the solubility of Group IV elements (Ti, Zr, Hf) in liquid aluminium below 800 °C, J. Phase Equilib. Diff., 2014. doi:10.1007/s11669-013-0278-2
U.R. Kattner, J.-C. Lin, and Y.A. Chang, Thermodynamic Assessment and Calculation of the Ti-Al System, Metall. Trans. A, 1992, 23(8), p 2081-2090
K. Shibata, T. Sato, and G. Ohira, The Solute Distributions in Dilute Al-Ti Alloys During Unidirectional Solidification, J. Cryst. Growth, 1978, 44(4), p 435-445
A. Abdel-Hamid, C.H. Allibert, and F. Durand, Equilibrium Between Titanium-Aluminum (TiAl3) and Molten Aluminum: Results from the Technique of Electromagnetic Phase Separation, Z. Metall., 1984, 75(6), p 455-458
W.L. Fink, H. Van, and P.M. Budge, Constitution of high-purity aluminum-titanium alloys, Am. Inst. Min. Met. Eng., 1931, 393, p 18
M. Heckler, Solubility of Titanium in Liquid Aluminum, Aluminium (Dusseldorf), 1974, 50(6), p 405-407
V.T. Witusiewicz, A.A. Bondar, U. Hecht, S. Rex, and T.Y. Velikanova, The Al-B-Nb-Ti System: III. Thermodynamic Re-evaluation of the Constituent Binary System Al-Ti, J. Alloys Compd., 2008, 465(1-2), p 64-77
I. Ohnuma, Y. Fujita, H. Mitsui, K. Ishikawa, R. Kainuma, and K. Ishida, Phase Equilibria in the Ti-Al Binary System, Acta Mater., 2000, 48(12), p 3113-3123
A. Prince, Alloy Phase Equilibria, Elsevier Science, Amsterdam, 1966
J.C. Schuster and M. Palm, Reassessment of the Binary Aluminum-Titanium Phase Diagram, J. Phase Equilib. Diffus., 2006, 27(3), p 255-277
Acknowledgments
Chemical microanalyses have been performed by the inorganic analysis team of Dr. Ayouni of the Analytical Sciences Institute. SEM and EPMA characterizations were performed at the ‘‘Centre Technologique des Microstructures, Université Lyon 1’’. The authors acknowledge gratefully the members of these services for their assistance.
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Dezellus, O., Gardiola, B., Andrieux, J. et al. On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System. J. Phase Equilib. Diffus. 35, 137–145 (2014). https://doi.org/10.1007/s11669-014-0282-1
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DOI: https://doi.org/10.1007/s11669-014-0282-1