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Abstrakty
A comprehensive understanding of melt quality is of paramount importance for the control and prediction of actual casting characteristics. Among many phenomenons that occur during the solidification of castings, there are four that control structure and consequently mechanical properties: chemical composition, liquid metal treatment, cooling rate and temperature gradient. The cooling rate and alloy composition are among them most important. This paper investigates the effect of some major alloying elements (silicon and copper) of Al-Si-Cu alloys on the size of the secondary dendrite arm spacing. It has been shown that both alloying elements have reasonable influence on the refinement of this solidification parameter.
Czasopismo
Rocznik
Tom
Strony
19--24
Opis fizyczny
Bibliogr. 19 poz., rys., tab., wykr.
Twórcy
autor
autor
- Product Development Center, Nemak Linz GmbH, Zeppelinstrasse 24, 4030 Linz, Austria, mile.djurdjevic@nemak.com
Bibliografia
- [1] Spear, R. E. & Gardner, G. R. (1963). Dendrite cell size. AFS Transactions. 71, 209-215.
- [2] Rhadhakrishna, K, Seshan, S., & Seshadri, M. R. (1980). Dendrite arm spacing in aluminium alloy castings, AFS Transactions 88, 695-702.
- [3] Flemings, M. Kattamis, T. Z. & Bardes, B. P. (1991). Dendrite arm spacing in aluminium alloys. AFS Transactions 99, 501-506.
- [4] Zang, B., Garro, M., & Tagliano, C. (2003). Dendrite arm spacing in aluminium alloy cylinder heads produced by gravity semi-permanent mold. Metallurgical Science and Technology 21, 3-9.
- [5] Davis J. R. (Eds.), (1994). ASM Specialty Handbook, Aluminium and Aluminium Alloys; ASM International, The Materials Information Society, 10-60.
- [6] ASM Handbook Volume 3: Alloy Phase Diagrams (1992). The Materials Information Society, 1-40.
- [7] Ciach, R. & Podosek, M. (1997). Solidification of Aluminum Alloys, In Proceedings of the NATO Advanced Studies, Institute on Advanced Light Alloys and Composites, Zakopane, Poland, September 5-15, 201-206.
- [8] Backerud, L. (1991). Solidification Characteristics of Aluminium Alloys. In AFS Skanaluminium Vol. 2 (1-75).
- [9] Bennon, W. D. Incropera, F. P. (1987). A Continuum Model for Momentum, Heat and Species Transport in Binary Solid-Liquid Phase Change Systems. Int. J. Heat Mass Transfer 30, 2161-2187.
- [10] Caceres, C. H. Djurdjevic, M. B. Stockwell, T. J. & Sokolowski, J. H. (1999). The Effect of Cu Content on the Level of Microporosity in Al-Si-Cu-Mg Casting Alloys. Scripta Materialia 40, 631-637.
- [11] Gruzleski, J. E. & Closset, B. M. (1990). The treatment of liquid aluminium-silicon alloys. American Foundryman's Society, Inc. Des Plaines, Illinois, USA, 1-35.
- [12] Tenekedjiev, N., Mulazimoglu, H., Closset, B. & Gruzleski, J. (1995). Microstructures and Thermal Analysis of Strontium-Treated Aluminium-Silicon Alloys, American Foundryman's Society, Inc. Des Plaines, Illinois, USA, 40-41.
- [13] Matuja, H., Giessen, B. C. & Grant, N. J. (1968). The effect of cooling rate on the dendrite spacing in splat-cooled aluminium alloys. The Journals of the Institute of Metals. (9), 30-32.
- [14] Ananthanarayanan, L. & Gruzleski, J. E. (1992). Thermal Analysis Studies on the Effect of Cooling Rate on the Microstructure of the 319 Aluminium Alloy. AFS Transactions. 141, 383-391.
- [15] Gowri, S. Comparison of thermal analysis parameters of 356 and 359 alloys. AFS Transactions. 94 (29), 503-508.
- [16] Kang, H. G., Miyahara, H. & Ogi, K. (1995). Influence of cooling rate and additions of Sr and Ti-B on solidification structures of AC4B type alloy. In Proceedings of the 3rd Asian Foundry Congress, edited by Lee Z. H., Hong C. P., and Kim M. H., November 8-10 (108-115). Kyongju Korea: The Korean Foundrymen's Society.
- [17] Chen, Y. F., Jong, S. H. & Hwang, W. S. (1995). The effect of cooling rate on the latent heat released mode for near pure aluminium and aluminium silicon alloy. In Cross, M. & Campbell, H. J. (Eds.), Modelling of Casting, Welding and Advanced Solidification Processes, VII Edition (483-490). The Minerals, Metals and Materials Society.
- [18] Figueredo, A. M., Sumartha, Y. & Flemings, M. C. (1998). Measurement and calculation of solid fraction in quenched semi-solid melts of rheocast aluminium alloy A357. In Welch, B. (Ed.), Light Metals (1103-1106). The Minerals, Metals and Materials Society.
- [19] Gruzleski, J. E. (2000). Microstructure development during metal casting, AFS (99-116). Des Plaines Illinois.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ7-0005-0004