Constitutive Models for AZ31 Magnesium Alloys


Article Preview

The present investigation aims at studying and modelling the flow behaviour of the AZ31 magnesium alloy by means of torsion tests performed in extended ranges of temperature and strain rates. Two types of rheological models were considered. The former is based on the power law equation, whilst the latter is based on the Sellars and Tegart approach. The effectiveness of the two constitutive models in describing the flow behaviour of the AZ31 magnesium alloy under investigation was evaluated. It was observed that both the equations are able to predict the flow behaviour of the material at different temperatures and strain rates. In particular, the former is very effective in predicting the hardening stage of the flow curve, whilst the latter allows to fit the softening stage. The models were used for the finite element analysis of a complex extrusion process and the results, in terms of the load-stroke curves, compared to each other.



Edited by:

Luca Tomesani and Lorenzo Donati




C. Bruni et al., "Constitutive Models for AZ31 Magnesium Alloys ", Key Engineering Materials, Vol. 367, pp. 87-94, 2008

Online since:

February 2008




[1] M. Chandrasekaran, Y.M. Shyan John, Material Science and Engineering Vol. A 381 (2004) 308-319.

[2] T. Mukai, M. Yamanoi, H. Watanabe and K. Higashi, Scripta Materialia Vol. 45 (2001) 89-94.

[3] J. Bohlen, S.B. Yi, J. Swiostek, D. Letzig, H.G. Brokmeier, K.U. Kainer, Scripta Materialia Vol. 53 (2005) 259-264.

DOI: 10.1016/j.scriptamat.2005.03.036

[4] C. Bruni, A. Forcellese, F. Gabrielli. Journal of Materials Processing Technology, Vol. 125- 126 (2002) 242-247.

[5] C. Bruni, A. Forcellese, F. Gabrielli. Edited by Kuljanic. Proceedings of the 6th International Conference on Advanced Manufacturing Systems and Technology, Udine, Italy, June 20-21, 2002, 367-374.

[6] C. Bruni, M. Cabibbo, A. Cruciani, A. Forcellese, F. Gabrielli. Steel Grips, Journal of steel and related materials Vol. 3 (2004) 499-504.

[7] Garofalo F. Transactions of the Metallurgical Society of Aime, Vol. 227, (1963), 351-356.

[8] Zener C., Hollomon J.H., Journal of Applied Physics. Vol. 15, (1944), 22-32.

[9] S. Spigarelli, M. El Mehtedi, M. Cabibbo, E. Evangelista, J. Kaneko, A. Jäger, V. Gartnerova, Journal of Material Science Eng. A462 (2007), 197-201.

[10] Sellars, C.M. and Tegart, W.J. McG., Int. Metall. Reviews, Vol. 17, (1972), 1-24.

[11] Fields, D.S. and Backofen, W.A., Proc. ASTM, Vol. 57, (1957) 1259-1272.

[12] L. Donati, S. Andreoli The die in extrusion: influence of the design choices on the performance of extruded profiles for automotive applications, Light Metal Age, April 2006, vol 64 n. 2, 28-33.

Fetching data from Crossref.
This may take some time to load.