Recrystallisation Resistance of Extruded and Cold Rolled Aluminium Alloys with Additions of Hf, Sc and Zr

Abstract:

Article Preview

A high recrystallisation resistance is required in aluminium alloys intended for processing or use at temperatures between 450°C-600°C. Additions of Hf, Sc and Zr significantly improve the resistance to recrystallisation through the formation of Al3X-dispersoids (X=Hf,Sc,Zr), and in this work different concentrations and combinations of these elements were added to five aluminium alloys. The alloys were extruded, subjected to various degrees of cold rolling (0%-80%) and finally annealed at high temperatures in order to study the structural stability. All variants displayed a high resistance towards recrystallisation, but the best results were obtained in the alloy containing only Sc and Zr. In this alloy no signs of recrystallisation were observed even after 1 hour annealing of extruded and 80% cold rolled profiles at 600°C.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

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

Pages:

525-530

DOI:

10.4028/www.scientific.net/MSF.519-521.525

Citation:

H. Hallem et al., "Recrystallisation Resistance of Extruded and Cold Rolled Aluminium Alloys with Additions of Hf, Sc and Zr", Materials Science Forum, Vols. 519-521, pp. 525-530, 2006

Online since:

July 2006

Export:

Price:

$35.00

[1] B. Forbord, H. Hallem, K. Marthinsen: Materials Forum Vol. 28 (eds. J.F. Nie et al. ), Institute of Materials Engineering Australia Ltd. (2004), p.1179.

[2] Y.W. Riddle: PhD-thesis, Georgia Inst. of Tech., Atlanta, Georgia, USA (2000).

[3] B. Forbord, W. Lefebvre, F. Danoix, H. Hallem, K. Marthinsen: Scripta Mat. 51 (2004), p.333.

DOI: 10.1016/j.scriptamat.2004.03.033

[4] V.V. Zakharov: Met. Sci. Heat Treat. 2 (1997), p.61.

[5] H. Hallem: PhD-thesis, Norwegian Univ. of Sci. and Tech. (NTNU), Trondheim, Norway (2005).

[6] Y. Harada, D.C. Dunand: Mater. Sci. and Eng. A329-331 (2002), p.686.

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