Abstract
Iron is generally regarded as an unavoidable impurity in Al-Si casting alloys. The acicular Al3Fe and β-Al5FeSi (or Al9Si2Fe2) are common iron-containing intermetallic compounds (IMCs) in conventional structure which have a detrimental impact on the mechanical properties. In this paper, ultrasonic field (USF) was applied to modify acicular iron phases in Al-12%Si-2%Fe and Al-2%Fe alloys. The results show that the USF applied to Al-Fe alloys caused the morphological transformation of both primary and eutectic Al3Fe from acicular to blocky and granular without changes in their composition. In the case of Al-Si-Fe alloys, ultrasonic treatment led to both morphological and compositional conversion of the ternary iron IMCs. When the USF was applied, the acicular β-Al9Si2Fe2 was substituted by star-like α-Al12Si2Fe3. The modification rate of both binary and ternary iron IMCs relates to the USF treatment duration. The undercooling induced by the ultrasonic vibration contributes to the nucleation of intermetallics and can explain the transformation effect.
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Seifeddine S, Johanson S, and Svensson I L. The Influence of Cooling Rate and Manganese Content on the B-Al5FeSi Phase Formation and Mechanical Properties of Al-Si-Based Alloys. Materials Science and Engineering: A, 2008, 490(1): 385–390.
Narayanan L A, Samuel F, and Gruzleski J. Crystallization Behavior of Iron-Containing Intermetallic Compounds in 319 Aluminum Alloy. Metallurgical and Materials Transactions A, 1994, 25(8): 1761–1773.
Eidhed W, Tezuka H, and Sato T. Effects of Cr and Cr/Mn Combined Additions on Semi-Solid Microstructures of Al-Mg-Si Alloys Produced by D-Ssf Process. Journal of Materials Science & Technology, 2008, 24(1): 21–24.
Lee S, Kim B, and Lee S. Prediction of Solidification Paths in Al-Si-Fe Ternary System and Experimental Verification: Part I. Fe-Containing Hypoeutectic Al-Si Alloys. Materials Transactions, 2011, 52(5): 1053–1062.
Du Y, Schuster J C, Liu Z K, et al. A Thermodynamic Description of the Al-Fe-Si System over the Whole Composition and Temperature Ranges A Hybrid Approach of Calphad and Key Experiments. Intermetallic, 2008, 16(4): 554–570.
Mondolfo L F. Aluminum Alloys: Structure and Properties. Butterworths, London, 1976.
Couture A. Iron in Aluminum Casting Alloys-a Literature Survey. AFS International Cast Metal Journal, 1981, 6(4): 9–17.
Adam C M, Hogan L M. Crystallography of the Al-Al3Fe Eutectic. Acta Metallurgical Materials, 1975, 123(3): 345–354.
Hughes I and Jones H. Coupled Eutectic Growth in Al-Fe Alloys. Journal of Materials Science, 1976, 11(10): 1781–1793.
Hollingsworth E H and Willet R E. Identification of a new Al-Fe constituent, FeAl6. Trans. Met. Soc. AIME., 1962, 224: 2.
Asensio-Lozano J and Suárez-Pena B. Influence of Sr Modification and Ti Grain Refinement on the Morphology of Re-Rich Precipitates in Eutectic Al-Si Die Cast Alloys. Scripta Materialia, 2006, 54(9): 1543–1548.
Gupta S P. Intermetallic Compound Formation in Fe-Al-Si Ternary System: Part I. Materials Characterization, 2002, 49(4): 269–291.
Kral M, McIntyre H, and Smillie M. Identification of Lntermetallic Phases in a Eutectic Al-Si Casting Alloy Using Electron Backscatter Diffraction Pattern Analysis. Scripta Materialia, 2004, 51(3): 215–219.
Kral M. A Crystallographic Identification of Intermetallic Phases in Al-Si Alloys. Materials Letters, 2005, 59(18): 2271–2276.
Shabestari S, Mahmudi T, Emamy M, et al. Effect of Mn and Sr on Intermetallics in Fe-Rich Eutectic Al-Si Alloy. International Journal of Cast Metals Research, 2002, 15(1):17–24.
Zang Y, Jie J, Gao Y, et al. Effects of Ultrasonic Treatment on the Formation of Iron-Containing Intermetallic Compounds in Al-12%Si-2%Fe Alloys. Intermetallics, 2013, 42(9): 120–125.
Jie J C, Zou Q C, Sun J L, et al. Separation Mechanism of the Primary Si Phase from the Hypereutectic Al-Si Alloy Using a Rotating Magnetic Field during Solidification. Acta Materialia, 2014, 72(7): 57–66.
Zhang Y, Jie J, Wu L, et al. Microstructure and Mechanical Properties of Al-8PctSi Alloy Prepared by Direct Chill Casting under Electromagnetic and Ultrasonic Fields. Metallurgical & Materials Transactions Part A, 2014, 45(4): 2014–2022.
Eskin G. Principles of Ultrasonic Treatment: Application for Light Alloys Melts. Advanced Performance Materials, 1997, 4(2): 223–232.
Shu D, Sun B, Mi J, et al. A High-speed Imaging and Modeling Study of Dendrite Fragmentation Caused by Ultrasonic Cavitation. Metallurgical and Materials Transactions A, 2012, 43(10): 3755–3766.
Atamanenko T, Eskin D, Zhang L, et al. Criteria of Grain Refinement Induced by Ultrasonic Melt Treatment of Aluminum Alloys Containing Zr and Ti. Metallurgical and Materials Transactions A, 2010, 41(8): 2056–2066.
Zhou Z. Research on Melt Treatment and Solidification Characteristics of Al-Fe Alloy. Ph. D. dissertation, Shenyang University of Technology, 2008. (In Chinese)
Osawa Y, Takamori S, Kimura T, et al. Morphology of Intermetallic Compounds in Al-Si-Fe Alloy and Its Control by Ultrasonic Vibration. Materials Transactions, 2007, 48(9): 2467–2475.
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Ting-ju Li Male, Ph.D., Professor. His research interests mainly focus on metal casting processes.
This work was financially supported by the National Natural Science Foundation of China (No. 51501027), and the China Postdoctoral Science Foundation (No. 2015M570246) and the Fundamental Research Funds for the Central Universities of China (DUT15RC(3)065).
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Zhang, Yb., Kateryna, S. & Li, Tj. Effect of ultrasonic treatment on formation of iron-containing intermetallic compounds in Al-Si alloys. China Foundry 13, 316–321 (2016). https://doi.org/10.1007/s41230-016-5066-2
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DOI: https://doi.org/10.1007/s41230-016-5066-2