JMMCE  Vol.3 No.1 , January 2015
Nucleation of Fe-Rich Intermetallic Phases on α-Al2O3 Oxide Films in Al-Si Alloys
ABSTRACT
Nucleation of Fe-rich intermetallic phases on α-Al2O3 oxide films was analyzed in five experimental Al-Fe-Mn-Si alloys. In an attempt to verify the role of α-Al2O3 films in nucleating Fe-rich intermetallics, experiments have been conducted under conditions where formed in situ oxide films were present. Some Fe-rich intermetallics are observed to be related with the oxide films in the microstructure, the present results are in accordance with some research that suggest that the Fe-rich intermetallic phases nucleate upon the oxide films. The intermetallic phases and α-Al2O3 films were unambiguously identified with the help of complementary techniques such as thermal analysis, SEM/EDS and X-ray diffraction.

Cite this paper
Orozco-González, P. , Castro-Román, M. , Maldonado-Ruíz, S. , Haro-Rodríguez, S. , Equihua-Guillén, F. , Muñiz-Valdez, R. , Luna-Álvarez, S. , Montoya-Dávila, M. and Hernández-Rodríguez, A. (2015) Nucleation of Fe-Rich Intermetallic Phases on α-Al2O3 Oxide Films in Al-Si Alloys. Journal of Minerals and Materials Characterization and Engineering, 3, 15-25. doi: 10.4236/jmmce.2015.31003.
References
[1]   Preston, R.S. and Gerlach, R. (1971) Mössbauer Effect in Dilute Alloys of Iron in Aluminum. Physical Review B, 3, 1519.
http://dx.doi.org/10.1103/PhysRevB.3.1519

[2]   Stefaniay, V., Griger, A. and Turmezey, T. (1987) Intermetallic Phases in the Aluminium-Side Corner of the AlFeSi-Alloy System. Journal of Materials Science, 22, 539-546.
http://dx.doi.org/10.1007/BF01160766

[3]   Crepeau, P.N. (1995) Effect of Iron in Al-Si Casting Alloys: A Critical Review. AFS Transactions, 103, 361-366.

[4]   Kuijpers, N.C.W., Vermolen, F.J., Vuik, C., Koenis, P.T.G., Nilsen, K.E. and van Zwaag, S. (2005) The Dependence of the β-AlFeSi to α-Al(FeMn)Si Transformation Kinetics in Al-Mg-Si Alloys on the Alloying Elements. Materials Science and Engineering A, 394, 9-19.
http://dx.doi.org/10.1016/j.msea.2004.09.073

[5]   Backerud, L., Król, E. and Tamminen, J. (1986) Solidification Characteristics of Aluminum Alloys. Vol. 1, AFS/Skana- luminum, Oslo.

[6]   Kral, M.V., Nakashima, P.N.H. and Mitchell, D.R.G. (2006) Electron Microscope Studies of Al-Fe-Si Intermetallics in an Al-11 Pct Si Alloy. Metallurgical and Materials Transactions A, 37A, 1987-1997.
http://dx.doi.org/10.1007/s11661-006-0141-8

[7]   Tibballs, J.E., Horst, J.A. and Simensen, C.J. (2001) Precipitation of α-Al(Fe,Mn)Si from the Melt. Journal of Materi als Science, 36, 937-941.
http://dx.doi.org/10.1023/A:1004815621313

[8]   Mondolfo, L.F. (1976) Aluminum Alloys: Structure and Properties. Butterworths and Co., Ltd., London, 806. http://dx.doi.org/10.1016/B978-0-408-70932-3.50404-6

[9]   Barlock, J.G. and Mondolfo, L.F. (1975) Structure of Some Aluminium-Iron-Magnesium-Manganesesilicon Alloys. Zeitschrift Fur Metallkunde, 66, 605.

[10]   Corby, R.N. and Black, P.J. (1977) The Structure of Aluminum-Iron-Silicon (α-(A1FeSi)) by Anomalous-Dispersion Methods. Acta Crystallographica Section B, 33, 3468-3475.
http://dx.doi.org/10.1107/S0567740877011224

[11]   Murali, S., Raman, K.S. and Murthy, K.S.S. (1992) Effect of Magnesium, Iron (Impurity) and Solidification Rates on the Fracture Toughness of Al-7Si-0.3Mg Casting Alloy. Materials Science and Engineering: A, 151, 1-10. http://dx.doi.org/10.1016/0921-5093(92)90175-Z

[12]   Shabestari, S. and Gruzleski, J.E. (1995) Gravity Segregation of Complex Intermetallics Compounds in Liquid Aluminum-Silicon Alloy. Metallurgical and Materials Transactions A, 26, 999-1006.
http://dx.doi.org/10.1007/BF02649097

[13]   Romming, C., Hansen, V. and Gjonnes, J. (1994) Crystal Structure of β-Al4.5FeSi. Acta Crystallographica Section B, 50, 307-312.
http://dx.doi.org/10.1107/S0108768193013096

[14]   Mulazimoglu, M.H., Zaluska, A., Gruzleski, J.E. and Paray, F. (1996) Electron Microscope Study of Al-Fe-Si Intermetallics in 6201 Aluminum Alloy. Metallurgical and Materials Transactions A, 27, 929-936. http://dx.doi.org/10.1007/BF02649760

[15]   Vybornov, M., Rogl, P. and Sommer, F. (1997) On the Thermodynamic Stability and Solid Solution Behavior of the Phases τ5-Fe2Al7.4Si and τ6-Fe2Al9Si2. Journal of Alloys and Compounds, 247, 154-157. http://dx.doi.org/10.1016/S0925-8388(96)02602-3

[16]   Shabestari, S.G., Mahmudi, M., Emamy, M. and Campbell, J. (2002) Effect of Mn and Sr on Intermetallics in Fe-Rich Eutectic Al-Si Alloy. International Journal of Cast Metals Research, 15, 17-24.

[17]   Cao, X. and Campbell, J. (2004) Effect of Sr on Primary α-Fe Phase in Liquid Al-11.5Si-0.4Mg Cast Alloy. Materials Science and Technology, 20, 514-520.

[18]   Cao, X. and Campbell, J. (2004) The Solidification Characteristics of Fe-Rich Intermetallics in Al-11.5Si-0.4-Mg Cast Alloy. Metallurgical and Materials Transactions A, 35, 1425-1435.
http://dx.doi.org/10.1007/s11661-004-0251-0

[19]   Miller, D.N., Lu, L. and Dahle, A.K. (2006) The Role of Oxides in the Formation of Primary Ironintermetallics in an Al-11.6Si-0.37Mg Alloy. Metallurgical and Materials Transactions B, 37, 873-878. http://dx.doi.org/10.1007/BF02735008

[20]   Khalifa, W., Samuel, F.H., Gruzleski, J.E., Doty, H.W. and Valtierra, S. (2005) Nucleation of Fe-Intemetallics Phases in the Al-Fe-Si Alloys. Metallurgical and Materials Transactions A, 36, 1017-1032. http://dx.doi.org/10.1007/s11661-005-0295-9

[21]   Lu, L. and Dahle, A.K. (2005) Iron-Rich Intermetallics Phases and Their Role in Castings Defect Formation in Hypo- eutectic Al-Si Alloys. Metallurgical and Materials Transactions A, 36, 819-835.

[22]   Anantha Narayanan, L., Samuel, F.H. and Gruzleski, J.E. (1994) Crystallization Behavior of Iron Containing Intermetallics Compounds in 319 Aluminum Alloy. Metallurgical and Materials Transactions A, 25, 1761-1773. http://dx.doi.org/10.1007/BF02668540

[23]   Cooper, M. and Robinson, K. (1966) The Crystal Structure of the Ternary Alloy α (AlMnSi). Acta Crystallographica, 20, 614-617. http://dx.doi.org/10.1107/S0365110X6600149X

[24]   Schurer, P.J., Koopmans, B. and Van der Woude, F. (1988) Structure of Icosahedral Al-(M1-xFex) Alloys (M = Cr, Mn, or Fe). Physical Review B, 37, 507-510.
http://dx.doi.org/10.1103/PhysRevB.37.507

[25]   Rivlin, V.G. and Raynor, G.V. (1981) Critical Evaluation of Constitution of Al-Fe-Si System. International Metals Reviews, 26, 133-152.

[26]   Cooper, M. (1967) The Crystal Structure of the Ternary Alloy α (AlFeSi). Acta Crystallographica, 23, 1106-1107. http://dx.doi.org/10.1107/S0365110X67004372

[27]   Saalfeld, H. (1964) The Crystal Chemistry of Al2O3-Cr2O3. Zeitschrift für Kristallographie—Crystalline Materials, 120, 342-348. http://dx.doi.org/10.1524/zkri.1964.120.4-5.342

[28]   Corby, R.N. and Black, P.J. (1977) The Structure of α-(AlFeSi) by Anomalous-Dispersion Methods. Acta Crystallographica Section B, 33, 3468-3475.
http://dx.doi.org/10.1107/S0567740877011224

 
 
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