Browse > Article

Prediction of Solidification Path in Al-Si-Fe Ternary System and Experimental Verification  

Lee, Sang-Hwan (Liquid Processing & Casting Process R&D Division, Korea Institute of Industrial Technology)
Lee, Sang-Mok (Liquid Processing & Casting Process R&D Division, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.30, no.1, 2010 , pp. 34-45 More about this Journal
Abstract
The effects of alloy elements and cooling rate on the solidification path and the formation behavior of $\beta$ phase in Fe-containing Al-Si alloys were studied based on the thermodynamic analysis and the pertinent experiments. The thermodynamic calculation was systematically performed by using Thermo-Calc program. For the thermodynamic analysis in high alloy region of Al-Si-Fe ternary system, a thermodynamic database for Thermo-Calc was correctly updated and revised by the collected up-to-date references. For the thermodynamic-based prediction of various solidification paths in Fe-containing Al-Si system, liquidus projection of Al-Si-Fe ternary system, including isotherms, invariant, monovariant, bivariant reactions and equilibrium temperatures, was calculated and analyzed as functions of composition and temperature. The calculated results were compared to the experimental results using various casting specimens. In order to analyze various solidification sequences as functions of Si and Fe content, 4 representative alloy compositions, low Fe content in both low and high Si contents and high Fe content again in both low and high Si contents, were designed in this study. For better understanding of the influence of cooling rate on the formation behavior of $\beta$ phase, 4 alloys were solidified under furnace and rapidly cooled conditions. Cooling curves of solidified alloys were recorded by thermal analysis. Various important solidification events were evaluated using the first derivative-cooling curves. Microstructures of the casting samples were studied by the combined analysis of optical microscopy (OM) and scanning electron microscopy (SEM).
Keywords
Al-Si-Fe system; Solidification path; $\beta$ phase; Fe content; Si content; Cooling rate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Du, J. C. Schuster, Z. K. Liu, R. Hu, P. Nash, W. Sun, W. Zhang, J. Wang, L. Zhang, C. Tang, Z. Zhu, S. Liu, Y. Ouyang, W. Zhang and N. Kredelsberger, "A Thermodynamic Description of the Al-Fe-Si System over the Whole Composition and Temperature Ranges via a Hybrid Approach of CALPHAD and Key Experiments", Intermetallics, 16 (2008) 554-570   DOI   ScienceOn
2 D. Munson, "A Clarification of the Phases Occurring in Al-Rich Al-Fe-Si Alloys with Particular Reference to the Ternary Phase $\alpha-AlFeSi$", J. Inst. Met., 95 (1967) 217-219
3 E. H. Dix Jr. and A. C. Heath Jr., "Equilibrium Relations in Al-Si and Al-Fe-Si Alloys of High Purity", Trans. AIME, Inst. Met. Div., (1928) 164-197
4 F. Bosselet, S. Pontevichi, M. S. Perronet and J. C. Viala, "Measurement of the Isothermal Section at 1000 K of Al-Fe-Si", J. Phy. IV, 122 (2004) 41-46
5 C. Guo, Z. Du, C. Li, B. Zhang and M. Tao, "Thermodynamic Description of the Al-Fe-Zr System", Calphad, 32 (2008) 637-649   DOI   ScienceOn
6 N. Krendelsberger, F. Weitzer and J. C. Schuster, "On the Reaction Scheme and Liquidus Surface in the Ternary System Al-Fe-Si", Metall. Mater. Tran. A, 38 (2007) 1681-1691   DOI   ScienceOn
7 Z. K. Liu and Y. A. Chang, "Thermodynamic Assessment of the Al-Fe-Si System", Metall. Mater. Tran. A, 30 (1999) 1081-1095   DOI   ScienceOn
8 G. Shao, "Thermodynamic Assessment of the Nb-Si-Al System", Intermetallics, 12 (2004) 655-664   DOI   ScienceOn
9 M. H. G. Jacobs and R. S. Fetzer, "Phase Behavior and Thermodynamic Properties in the System Fe-Al", Calphad, 33 (2009) 170-178   DOI   ScienceOn
10 A. G. C. Gwyer and H. W. L. Phillips, "The Ternary System Al-Si-Fe", J. Inst. Met., 38 (1927) 44-83
11 J. A. Taylor, "The Effect of Fe in Al-Si Casting Alloys", 35th Australian Foundry Institute National Conference (2004) 148-157
12 S. P. Gupta, "Intermetallic Compound Formation in Fe-Al-Si Ternary System Part I", Mater. Charact., 49 (2003) 269-291
13 S. Seifeddine, S. Jhansson and I. L. Svensson, "The Influence of Cooling Rate and Mn Content on the $\beta-Al_5FeSi$ Phase Formation and Mechanical Properties of Al-Si-based Alloys", Mater. Sci. Eng. A, 490 (2008) 385-390   DOI   ScienceOn
14 X. Ma, A. M. Samuel, F. H. Samuel, H. W. Doty and S. Valtierra, "A Study of Tensile Properties in Al-Si-Cu and Al-Si-Mg Alloys", Mater. Sci. Eng. A, 490 (2008) 36-51   DOI   ScienceOn
15 H. P. Takeda and K. Mutuzaki, "The Equilibrium Diagram of the Fe-Al-Si System", Tetsu-to-Hagane, 26 (1940) 335-361   DOI
16 S T. Maitra and S. P. Gupta, "Intermetallic Compound Formation in Fe-Al-Si Ternary System Part II", Mater. Charact., 49 (2003) 293-311