The Role of Copper in the Precipitation Kinetics of 6000 Series Al Alloys


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The role of Cu in precipitation behavior of 6000 series aluminum alloys has been investigated by isothermal calorimetry and transmission electron microscopy. The newly developed analytical techniques have been used to evaluate the precipitation kinetics in alloys with or without an initial pre-aging history. It has been found that Cu addition results in increasing the rate of precipitation when artificial aging is applied immediately after solutionizing and quenching. However, Cu has no significant effect on the kinetics of precipitation in alloys with the pre-aging history, while it produces finer microstructures in the pre-aged and then artificially aged alloys. These observations have been explained by the effect of Cu on increasing the rate of precipitate nucleation in 6000 series alloys. It has also been suggested that the effect of Cu on nucleation arises from the role of Cu on the cluster formation during and/or immediately after quenching.



Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd




S. Esmaeili and D. J. Lloyd, "The Role of Copper in the Precipitation Kinetics of 6000 Series Al Alloys", Materials Science Forum, Vols. 519-521, pp. 169-176, 2006

Online since:

July 2006




[1] D.J. Lloyd, Advances in Industrial Materials, D.S. Wilkinson, W.J. Poole, eds. (The Metallurgical Society of CIM, Canada 1998) p.3.

[2] P.E. Fortin, M.J. Bull, D.M. Moore, SAE Technical Paper Series 830096 (International Congress & Exhibition, Detroit, MI, Feb. 28 - March 4, SAE, USA 1983).

[3] D.J. Lloyd, Materials Science Forum Vol. 28 (2004), J.F. Nie, A.J. Morton, B.C. Muddle eds. (Institute of Materials Engineering Austalasia Ltd, Australia 2004) p.107.

[4] A.K. Gupta, J. B. Bookbinder, H. S. Sang and D. J. Lloyd, Materials Science Forum, Vol. 331-337 (2000) 1297.

[5] A.K. Gupta, D.J. Lloyd, S.A. Court, Materials Science and Engineering A316 (2001)11.

[6] S.M. Hirth, G.J. Marshall, S.A. Court, D.J. Lloyd. Materials Science and Engineering A319- 321 (2001) 452.

[7] D.J. Lloyd, A.K. Gupta, Thermec 97 (International Conference on Thermomechanical processing of Steels and Other Materials), T. Chandra, T. Sakai eds. (TMS, USA 1007) p.99.

[8] Miao WF, Laughlin DE. Metallurgical and Materials Transactions A 31A (2000) 361.

[9] S. Esmaeili, D.J. Lloyd, Scripta Materialia 50 (2004) 155.

[10] S. Esmaeili, X. Wang, D.J. Lloyd, W.J. Poole, Metallurgical and Materials Transactions A 34A (2003) 751.

[11] S. Esmaeili, D.J. Lloyd, W.J. Poole, Acta Materialia 51 (2003) 2243.

[12] S. Esmaeili, D.J. Lloyd, W.J. Poole, Acta Materialia 51 (2003) 3467.

[13] S. Esmaeili, D.J. Lloyd, Acta Materialia 53 (2005) 5257.

[14] S. Esmaeili, D.J. Lloyd, Materials Characterization 55 (2005) 307.

[15] S. Esmaeili, Unpublished Results (2004).

[16] A. Morely, MEng Thesis, University of Oxford (2004).