Recrystallization Behaviour of Two Magnesium Alloys

Abstract:

Article Preview

The deformation and recrystallization behaviour of two magnesium alloys, WE43 and an experimental “Alloy A1” containing a large amount of second phase, have been investigated. Optical microscopy and electron backscattered diffraction (EBSD) were used to observe each alloy after deformation in a channel die at 553 and 558 K and subsequent recrystallization during annealing at 673 K. Alloy A1 dynamically recrystallised during deformation at 553 and 558 K. In WE43 the particle distribution affected the onset of dynamic recrystallization. Both alloys exhibited evidence of particle stimulated nucleation (PSN) of recrystallization at second phase particles as well as recrystallization at pre-existing grain boundaries. The A1 and WE43 alloys were extruded at temperatures of 573 K and 633 and 663 K, respectively. The extruded microstructures were compared to those that developed during channel die deformation.

Info:

Periodical:

Materials Science Forum (Volumes 467-470)

Edited by:

B. Bacroix, J.H. Driver, R. Le Gall, Cl. Maurice, R. Penelle, H. Réglé and L. Tabourot

Pages:

477-482

Citation:

L.W.F. Mackenzie et al., "Recrystallization Behaviour of Two Magnesium Alloys", Materials Science Forum, Vols. 467-470, pp. 477-482, 2004

Online since:

October 2004

Export:

Price:

$38.00

[1] Prangnell, P., and Ball, E., Scripta Met. and Mat., Vol. 31 (1994), p.111.

[2] Mackenzie, L.W.F., Humphreys, F.J., Lorimer, G.W., Savage, K. and Wilks, T., Magnesium Alloys and their Applications, DGM, (Ed. Kainer, K.U. ), (Wiley-VCH, Germany 2003), p.158.

[3] Wang, Y.N. and Huang, J.C., Mat. Chem. and Phys., Vol. 81 (2003), p.11.

[4] Agnew, S.R., Yoo, M.H. and Tomé, C.N., Acta Mat., Vol. 49 (2001), p.4277.

[5] Humphreys, F.J. and Hatherley, M., Recrystallization and Related Annealing Phenomena, 2nd Ed., Ch. 9, (Elsevier, United Kingdom 2004).

[6] Humphreys, F.J., Acta Met., Vol. 25 (1977), p.1323 Acknowledgements The authors would like to thank the EPSRC and Magnesium Elektron Ltd for financial support.