On the Origin of the Enhanced Creep Resistance in Underaged Al-Cu Based Alloys


Article Preview

It has recently been observed that the creep resistance of Al-Cu based precipitation hardened alloys may be enhanced through use of the underaged temper. We have treated this problem theoretically by considering the motion of a dislocation through a precipitation hardened structure and discuss the physical origin of the enhanced creep resistance in the underaged condition. The variation in expected creep resistance as a function of aging treatment is calculated and the possible generality of the experimental observations is considered.



Materials Science Forum (Volumes 519-521)

Edited by:

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




C. R. Hutchinson et al., "On the Origin of the Enhanced Creep Resistance in Underaged Al-Cu Based Alloys", Materials Science Forum, Vols. 519-521, pp. 1029-1034, 2006

Online since:

July 2006




[1] S.R. Arumalla and I.J. Polmear, in Proceedings of the 7th International Conference on the Strength of Metals and Alloys (Pergamon Press, Oxford, p.453, 1985).

[2] R.N. Lumley, A. Morton and I. J. Polmear, Acta Mater., Vol. 50 (2002), p.3597.

[3] Y. Estrin, in Unified Const. Laws of Plastic Deformation (Acad. Press, New York, p.69, 1996).

[4] J. Rösler and E. Arzt, Acta Metall., Vol. 36 (1988), p.1043.

[5] R. Langeborg and B. Bergmann, Metal Science, Vol. 10 (1976), p.20.

[6] J. Rösler, Mat. Sci. & Eng, A339, (2003), p.334.

[7] P. Yavari and T.G. Langdon, Acta Metall., Vol. 30 (1982), p.2181.

[8] M.S. Soliman, Mat. Sci. & Eng., A201 (1995), p.111.

[9] C. R. Hutchinson, J. -F Nie and S. Gorsse, Metall. Mater. Trans. A. 36A (2005), p. (2093).

[10] R.W. Fonda, W.A. Cassada and G.J. Shiflet, Acta Metall. Mater., Vol. 40 (1992), p.2539.

[11] V. Vaithyanathan, C. Wolverton and L.Q. Chen, Acta Mater., Vol. 52 (2004), p.2973.

[12] I.J. Polmear, Mat. Sci. & Tech, Vol. 15 (1999), p.861.

[13] R.N. Lumley, I.J. Polmear and A.J. Morton, Mat. Sci. & Tech., Vol. 21, (2005), p.1025.

[14] J-F Nie and B.C. Muddle, J. Phase Equil., Vol. 9 (1998), p.543.