Abstract
The solidification structures of Al-Cu 206 cast alloys at a high iron level of 0.5 pct were systematically studied by means of differential scanning calorimetry, electron backscattered diffraction, and transmission electron microscopy. The full solidification sequences of the 206 cast alloys at 0.5 pct Fe were established. The influences of both alloy composition (i.e., Si and Mn contents) and cooling rate on the formation and phase selection of the iron-rich intermetallics have been systematically explored. At a cooling rate of 12 K/min, it was found that one of the three iron-rich phases, i.e., Chinese script Alm(FeMn) and α-Fe, or platelet Al3(FeMn), may precipitate as the dominant iron-rich intermetallic, depending on Si and Mn contents. However, the dominant Chinese script iron-rich intermetallics, Alm(FeMn) and/or α-Fe, can be fully obtained for the 206 Al-Cu cast alloys at 0.5 pct Fe above a threshold cooling rate that can easily be obtained in normal industrial casting conditions, indicating that there is a significant potential of designing and developing new 206 Al-Cu cast alloys with a high tolerant iron content.
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P. Gilgien, A. Zryd, and W. Kurz: Acta Metall. Mater., 1995, vol. 43, pp. 3477–87.
C.M. Allen, K.A.Q. O’Reilly, B. Cantor, and P.V. Evans: Prog. Mater. Sci., 1998, vol. 43, pp. 89–170.
W. Khalifa, F.H. Samuel, and J.E. Gruzleski: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 807–25.
M.W. Meredith, A.L. Greer, P.V. Evans, and R.G. Hamerton: Light Metals, San Diego, CA, 1999, pp. 811–17.
X.G. Chen: Light Metals, Minerals, Metals & Materials Soc (TMS), San Antonio, TX, 1998, pp. 1071–76.
M.W. Meredith, A.L. Greer, and P.V. Evans: Light Metals, Minerals, Metals & Materials Soc (TMS), San Antonio, TX, 1998, pp. 977–82.
C.M. Adam and L.M. Hogan: Acta Metall., 1975, vol. 23, pp. 345–54.
L. Bäckerud: Jernkont. Ann., 1968, vol. 152, pp. 109–38.
I.R. Hughes and H. Jones: J. Mater. Sci., 1976, vol. 11, pp. 1781–93.
L. Dong and J. Howard: Z. Metallkde, 1992, vol. 83, pp. 224–26.
N.A. Belov, A.A. Aksenov, and D.G. Eskin: Iron in Aluminum Alloys: Impurity and Alloying Element, Taylor & Francis, London, 2002.
R.M. Srivastava, J. Eckert, W. Löser, B.K. Dhindaw, and L. Schultz: Metall. Trans., 2002, vol. 43, pp. 1670–75.
G.K. Sigworth and J. Fred Major: Light Metals, Minerals Metals & Materials Soc (TMS), San Antonio, TX, 2006, pp. 795–99.
H. Kamguo Kamga, D. Larouche, M. Bournane, and A. Rahem: Metall. Mater. Trans. A, 2010, vol. 41A, pp. 2844–55.
K. Liu, X. Cao, and X.G. Chen: Metall. Mater. Trans. B (on-line published), doi:10.1007/s11663-012-9694-7, 2012.
C.J. Tseng, S.L. Lee, T.F. Wu, and J.C. Lin: Mater. Trans. JIM, 2000, vol. 41, pp. 708–13.
K. Liu, X. Cao, and X.G. Chen: J. Mater. Sci., 2012, vol. 47, pp. 4290–98.
K. Liu, X. Cao, and X.G. Chen: Metall. Mater. Trans. A, 2012, vol. 43A, pp. 1097–1101.
K. Liu, X. Cao, and X.G. Chen: Metall. Mater. Trans. A, 2011, vol. 42A, pp. 2004–16.
K. Liu, X. Cao, and X.G. Chen: Light Metal—Advances in Materials and Processes, Met. Soc., Vancouver, BC, Canada, 2010, pp. 113–20.
H.K. Kamga, D. Larouche, M. Bournane, and A. Rahem: Int. J. Cast Met. Res., 2012, vol. 25, pp. 15–25.
A. Couture: Int. Cast Met. J., 1981, vol. 6, pp. 9–17.
C.J. Tseng: Ph.D. Thesis, Engineering College, National Central University, Taiwan, China, 2003.
W. Bonsack: ASTM Bull., 1942, vol. 117, pp. 45–59.
W. Bonsack: ASTM Bull., 1943, vol. 124, pp. 41–51.
C.L. Chen and R.C. Thomson: J. Alloy. Compd., 2010, vol. 490, pp. 293–300.
M. Kral: Scripta Mater., 2004, vol. 51, pp. 215–19.
P. Skierpe: Acta Crystallogr., 1988, vol. B44, pp. 480–86.
R.M.K. Young and T.W. Clyne: Scripta Metall. Mater., 1981, vol. 15, pp. 1211–16.
K. Sahoo, S. Das, and B. Murty: Mater. Sci. Eng. A, 2003, vol. 355, pp. 193–200.
D.H. Kim and B. Cantor: J. Mater. Sci., 1994, vol. 29, pp. 2884–92.
P. Skjerpe: Mater. Trans. A, 1987, vol. 18A, pp. 189–200.
Y.J. Li and L. Arnberg: Acta Mater., 2004, vol. 52, pp. 2673–81.
Y.J. Li and L. Arnberg: Acta Mater., 2004, vol. 52, pp. 2945–52.
X. Cao and J. Campbell: Metall. Mater. Trans. A, 2004, vol. 35A, pp. 1425–35.
B.L. Bramfitt: Metall. Trans., 1970, vol. 1, pp. 1987–95.
J. Campbell: Castings, Butterworth-Heinemann, Oxford, 1991.
L. Bäckerud: Solidification Characteristics of Aluminum Alloys, Skanaluminium, Universitetsforlaget AS, Oslo, 1986.
W.T. Denholm, J.D. Esdaile, N.G. Siviour, and B.W. Wilson: Metall. Trans. A, 1984, vol. 15A, pp. 1311–17.
P.V. Evans, J. Worth, A. Bosland, and S.C. Flood: Proceedings of the 4 th Decennial International Conference on Solidification Processing (SP’97), University of Sheffield, Sheffield, 1997, pp. 531–35.
R.W. Thomas, H. Cama, P.V. Evans, and J.D. Hunt: Proceedings of the 4 th Decennial International Conference on Solidification Processing (SP’97), University of Sheffield, Sheffield, 1997, pp. 559–63.
Acknowledgments
The authors would like to acknowledge the financial supports from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Rio Tinto Alcan, through the NSERC Industry Research Chair in Metallurgy of Aluminum Transformation at the University of Québec at Chicoutimi.
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Manuscript submitted May 28, 2012.
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Liu, K., Cao, X. & Chen, XG. Formation and Phase Selection of Iron-Rich Intermetallics in Al-4.6Cu-0.5Fe Cast Alloys. Metall Mater Trans A 44, 682–695 (2013). https://doi.org/10.1007/s11661-012-1419-7
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DOI: https://doi.org/10.1007/s11661-012-1419-7