Observation of As-Cast Microstructure Feature of Al Sheet Used for Can Manufacturing with High Forming Properties

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The as-cast microstructure feature of Al sheet with high forming properties used for pressure can manufacturing pre-treated by different melt-treatment technique was observed and analyzed by SEM, EDAX, TEM and selected area electron diffraction (SAED), etc. It was found that the oxide inclusions in Al sheet were mainly γ-Al2O3, and the Fe-rich impurity phases in the sheet mainly Al3Fe, T1(Al12Fe3Si) or (AlFeSiRE). The crystal structure of (AlFeSiRE) phase was too complicated to be determined. The effect of melt-treatment technique on the as-cast microstructure of the sheet was remarkable. There were a number of oxide inclusions in the Al sheet before or after conventional melt-treatment, which distributed non-uniformly and gathered together in larger block shape with the size of about 10-40μm. The Fe-rich impurity phases in the sheet were mainly Al3Fe and T1, and a few of the meta-stable phase Al6Fe existed in the sheet. These Fe-rich impurity phases appeared in a coarse, long needle/flake or skeletal form, and were easily to gather together with oxide inclusions. When the Al sheet was treated by high-efficient melt-treatment, the amout of oxide inclusions was decreased obviously, and these inclusions distributed more uniformly in the tiny granular form (about or less than 4μm). The Fe-rich impurity phases were mainly (AlFeSiRE), and a small amount of Al3Fe phases also existed in the material. The (AlFeSiRE) phases distributed uniformly along grain boundary in tiny group/sphere or short stick form. No congregation of Fe-rich phases with oxide inclusions was found in the material.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

983-988

Citation:

G. S. Fu et al., "Observation of As-Cast Microstructure Feature of Al Sheet Used for Can Manufacturing with High Forming Properties", Materials Science Forum, Vols. 546-549, pp. 983-988, 2007

Online since:

May 2007

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$38.00

[1] G.S. Fu, K.W. Qian, J.X. Kang: Materials Review(in Chin. ) Vol. 12 (2000, 12), p.25.

[2] G.S. Fu, W.Z. Chen: The Chinese Journal of Nonferrous Metals(in Chin. ) Vol. 12(2002), p.269.

[3] G.S. Fu, J.X. Kang: The Chinese Journal of Nonferrous Metals(in Chin. ) Vol. 11(2001), p.433.

[4] G.S. Fu, W.Z. Chen, K.W. Qian: Key Engineering Materials Vol. 297-300 (2005), p.482.

[5] G.S. Fu, F.S. Sun, L.Y. Ren: Journal of Rare Earths Vol. 20(2002), p.61.

[6] G.S. Fu, W.Z. Chen, K.W. Qian: Journal of Rare Earths Vol. 21(2003), p.571.

[7] W.X. Liu, X.Y. Huang, Y.R. Chen: Electron microcosmic analyses of materials structures(in Chin. ) (Tianjin University Press, Tianjin1989).

[8] R.Q. Gong, C.G. Jin, F.X. Liu: Metallographic Pictures of Casting Al Alloys(in Chin. )(Central South University of Technology Press, Changsha1987).

[9] F.S. Pan, S.Z. Zhou, P.D. Ding: Chinese Journal of Mechanical Engineering(in Chin. ) Vol. 26 (1990, 4), p.7.

[10] X.G. Chen, S. Englers: AFS Transactions Vol. 102(1994), p.673.

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