The Initial Practice on Electro-Modification Processes to Al-12Si Alloys

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The modification of Si-flakes from coarse acicular to fine fibrous is a common issue in Al-Si alloys casting products. The one of aims of this work is to practice the probability of applying the pulsed electric discharge (PED) to modify the morphology of Si-flakes. In the experiment, the Al-12Si alloy cast in plaster mold was treated with high voltage pulse electric discharge during the solidification. The combined effects of strong pulse electric current and chemical additives of refiner/modifier on solidification structure of eutectic silicon and tensile properties were studied. The experimental results indicated that the eutectic silicon flakes can be fragmentized by high-density pulse electric current. The best tensile properties were obtained when pulse electric discharge was used and combined with a trifle addition of refiner/modifier into the molten metal.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

814-817

Citation:

H. G. Ren and Z. L. Zhao, "The Initial Practice on Electro-Modification Processes to Al-12Si Alloys", Advanced Materials Research, Vols. 189-193, pp. 814-817, 2011

Online since:

February 2011

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$41.00

[1] B. Closset, J.E. Gruzleski, AFS Trans 90(1982), p.453.

[2] S. Khan, A. Ourdjini, Q.S. Hamed, M.A. Najafabadi, R. Elliot, Mater Sci 28(1993), p.5957.

[3] S.Z. Lu, A. Hellawell, Metall Trans 18A(1987), p.1721.

[4] M. Nakada, Y. Shiohara, M.C. Flemings, ISIJ International 30(1990), p.27.

[5] J.M. Li, S.L. Li, J. Li, Scripta Metall. Mater., 31(1994), p.1691.

[6] M. Gao, G. H. He, F. Yang, J.D. Guo, Z.X. Yuan, B.L. Zhou, Materials Science and Engineering A337(2002), p.110.

[7] Heng Cui, Yanbing Zong, Daqiang Cang, Lingzhen Li, and Jun Zhang, Journal of University of Science and Technology Beijing, 14 (2007), p.317.

DOI: https://doi.org/10.1016/s1005-8850(07)60062-0

[8] X. Jian, T.T. Meek, Q. Han, Scripta Materialia 54(2006), p.893.