Abstract
The opportunities for extruded and sheet magnesium products in the automotive industry, in particular, are increasing as the quest for lightweighting gains momentum. However, the current alloys all have limitations and these are accentuated when higher productivity targets are also imposed. This article attempts to summarize the strengths and weaknesses of the current wrought alloys, with particular emphasis on the extrusion process, and also considers alternative processing routes which may be useful in overcoming some of these shortcomings.
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References
A. Beck, The Technology of Magnesium and its Alloys (London: F.A. Hughes & Co. Ltd., 1941), p. 374.
M.R. Barnett, private communication (2004).
M. Chandrasekaran and Y.M.S. John, “Effect of Materials and Temperature on the Forward Extrusion of Magnesium Alloys,” Mater. Sci. Eng. A, 381 (2004), pp. 308–319.
J.P. Doan and G. Ansel, “Some Effects of Zirconium on Extrusion Properties of Magnesium-base Alloys Containing Zinc,” Trans. AIME, 171 (1947), pp. 286–305.
Y. Zhang et al., “Effects of Yttrium on Microstructure and Mechanical Properties of Hot-Extruded Mg-Zn-Y-Zr Alloys,” Mater. Sci. Eng. A, 373 (2004), pp. 320–327.
R.S. Busk, Magnesium Products Design (New York: Marcel Dekker, Inc., 1987), pp. 285–294.
O. Sivakesavam and Y.V.R.K. Prasad, “Hot Deformation Behaviour of As-Cast Mg-2Zn-1Mn Alloy in Compression: A Study with Processing Map,” Mater. Sci. Eng. A, 362 (2003), pp. 118–124.
W.H. Sillekens et al., “Hydrostatic Extrusion of Magnesium: Process Mechanics and Performance,” Mater. Sci. Forum, 426–432 (2003), pp. 629–636.
S. Kleiner and P.J. Uggowiter, “Mechanical Anisotropy of Extruded Mg-6%Al-1%Zn Alloy,” Mater. Sci. Eng. A, 379 (2004), pp. 258–263.
C. Davies and M. Barnett, “Expanding the Extrusion Limits of Wrought Magnesium Alloys,” JOM, 56 (9) (2004), pp. 22–24.
H. Zhou et al., “Effect of Cerium on Microstructures and Mechanical Properties of AZ61 Wrought Magnesium Alloy,” J. Mater. Sci., 39 (2004), pp. 7061–7066.
G.C. Weatherly, private communication (1996).
G.S. Foerster, “Weldable High Strength Magnesium Base Alloy,” U.S. patent 3,146,096 (25 August 1964).
L.L. Rokhlin, Magnesium Alloys Containing Rare Earth Metals (London: Taylor & Francis, 2003), p. 217.
K. Grube, J.A. Davis, and L.W. Eastwood, “Magnesium-Cerium Wrought Alloys for Elevated-Temperature Service,” Proc. ASTM, 50 (1950), pp. 965–988.
T.E. Leontis, “Effect of Rare-Earth Metals on the Properties of Extruded Magnesium,” Trans. AIME, 191 (1951), pp. 987–993.
F.M. Elkin and V.G. Davydov, “Russian Ultralight Constructional Mg-Li Alloys. Their Structure, Properties, Manufacturing, Applications,” Magnesium, ed. K.U. Kainer (Weinheim Germany: Wiley-VCH, 2004), pp. 95–99.
T.G. Byer, P.D. Frost, and E.L. White, The Development of Magnesium-Lithium Alloys for Structural Applications Final Technical Report, NASA-CR-62219 (1963), pp. 1–106.
H. Haferkamp, Fr.-W. Bach, and P. Juchmann, “New Magnesium-Lithium Alloys of Higher Ductility,” Aluminium, 76 (2000), pp. 1046–1050.
S.R. Agnew, M.H. Yoo, and C.N. Tome, “Application of Texture Simulation to Understanding Mechanical Behaviour of Mg and Solid Solution Alloys Containing Li or Y,” Acta. Mater., 49 (2001), pp. 4277–4289.
Fr.-W. Bach, M. Schaper, and C. Jaschik, “Influence of Lithium on hcp Magnesium Alloys,” Mater. Sci. Forum, 419–422 (2003), pp. 1037–1042.
S.K. Das, “Rapidly Solidified P/M Aluminium and Magnesium Alloys—Recent Developments,” Rev. Particulate Mater., 1 (1993), pp. 1–40.
D. Liang and C.B. Cowley, “The Twin-Roll Strip Casting of Magnesium,” JOM, 56 (5) (2004), pp. 26–28.
H.LI.D. Pugh, “Mechanical Properties under Pressure and Their Significance in the Forming of Metals,” Bulleid Memorial Lectures Vol. 111B (Nottingham, U.K.: Univ. of Nottingham, 1965), pp. 1–61.
D.J. Hawkes and R.E. Morgan, “Conform Extrusion—Current Methods and Capabilities,” Wire Industry, 58 (6) (1991), pp. 323–326.
S.-Y. Chang et al., “Improvement of Mechanical Characteristics in Severely Plastic-Deformed Mg Alloys,” Mater. Trans. JIM, 45 (2) (2004), pp. 488–492.
H. Watanabe et al., “Low Temperature Superplasticity of a Fine-Grained ZK60 Magnesium Alloy Processed by Equal-Channel-Angular Extrusion,” Scripta Mater., 46 (2002), pp. 851–856.
T. Mukai et al., “Ductility Enhancement in AZ31 Magnesium Alloy by Controlling Its Grain Structure,” Scripta Mater., 45 (2001), pp. 89–94.
S.R. Agnew et al., “Enhanced Ductility in Strongly Textured Magnesium Produced by Equal Channel Angular Processing,” Scripta Mater., 50 (2004), pp. 377–381.
K. Matsubara et al., “Achieving Enhanced Ductility in a Dilute Magnesium Alloy through Severe Plastic Deformation,” Metal. Mater. Trans. A, 35A (2004), pp. 1735–1744.
G.J. Raab et al., “Continuous Processing of Ultrafine Grained Al by ECAP-Conform,” Mater. Sci. Eng. A, 382 (2004), pp. 30–34.
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For more information, contact Colleen Bettles, CMIT Private Bag 33, Clayton South MDC, Clayton Victoria 3169, Australia; +61-3-95452936; fax +61-3-95441128; e-mail Colleen.Bettles@csiro.au.
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Bettles, C., Gibson, M. Current wrought magnesium alloys: Strengths and weaknesses. JOM 57, 46–49 (2005). https://doi.org/10.1007/s11837-005-0095-0
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DOI: https://doi.org/10.1007/s11837-005-0095-0