Boundary Mobilities in Binary Al-Mn Alloys

Abstract:

Article Preview

This paper described new characterization methods and data to quantify the influence of solute atoms on grain boundary and sub-grain boundary mobilities in Al-Mn alloys with a view to their integration into recovery and recrystallization modelling. Detailed SEM measurements of grain boundary mobilities during recrystallization have been made by in-situ annealing experiments on cold deformed Al – 0.1 and 0.3wt.% Mn binary alloys. Stored energies are estimated from the sub-grain sizes and misorientations and the boundary velocities directly measured in the temperature range 200-450°C. It is shown that in many cases good agreement with the Cahn, Lücke, Stüwe model for solute drag is obtained, e.g. the activation energies are intermediate between those of boundary and volume solute diffusion. Some particular cases of rapid growth occur in Al-0.1%Mn indicating boundary breakaway from solute clouds. A complementary study of sub-grain boundary mobilities has started on the same alloys; in this case the average mobilities are estimated from FEG-SEM growth data for the average sub-grain size for temperatures in the range 150-300°C. The results are compared with some previous data on Al-Si and show similar rates.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

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

Pages:

1597-1604

DOI:

10.4028/www.scientific.net/MSF.519-521.1597

Citation:

J. H. Driver et al., "Boundary Mobilities in Binary Al-Mn Alloys", Materials Science Forum, Vols. 519-521, pp. 1597-1604, 2006

Online since:

July 2006

Export:

Price:

$38.00

[1] O. Dimitrov, R. Fromageau, M.O. Dimitrov, in: F. Haessner (Ed. ) Recrystallization of Metallic Materials, (Reider Verlag, Berlin, 1978).

[2] P. Gordon, R.A. Vandermeer: Trans. AIME Vol. 224 (1962) pp.917-928.

[3] J.W. Cahn, Acta Metall.: vol. 10, (1962) pp.789-798.

[4] K. Lücke, H.P. Stüwe in: L. Himmel (Ed. ) Recovery and Recrystallization of Metals (Gordon and Breach, New York, 1962) pp.171-209.

[5] K. Lücke, H.P. Stüwe: Acta Metall. vol. 19 (1971) 1087-1099.

[6] G. Liao, R. LeGall and G. Saindrenan: Mater. Sci. Techn. vol. 14, (1998), p.411.

[7] A. Lens, C. Maurice and J.H. Driver: Mater. Sci & Eng. vol. A403 (2005), pp.144-153.

[8] F.J. Humphreys: J. Microsc. Vol. 195, (1999), 170.

[9] Y. Huang and F.J. Humphreys: Acta Mater. vol. 47 (1999), p.2259.

[10] H. Bakker: Diffusion in Solid Metals and Alloys (Springer Verlag, Berlin, 1990).

[11] A.P. Sutton and R.W. Balluffi: Interfaces in Crystalline Materials (Oxford Science Publ. 1995).

[12] Y. Huang and F.J. Humphreys: Acta Mater. vol. 48 (2000), p.2017-(2030).

[13] F.J. Humphreys and M. Hatherley: Recrystallization and related annealing phenomena (Pergamon, 1996).

[14] E. Nes: Acta Metall. Mater. vol. 43 (1995), p.2189.

[15] W. Fricke: Scripta Met. vol. 6 (1972), p.1139.

In order to see related information, you need to Login.