Abstract
Magnesium wrought alloys are of special interest for use as structural parts due to the possibility of obtaining improved and more homogeneous microstructure and mechanical properties compared with cast components. The market for magnesium wrought alloys is still relatively small, and they are only used for special applications due to the high cost of the feedstock. Currently, with the decreasing prices for the primary magnesium extrusion, magnesium has become competitive with aluminum, and is important for upcoming research and development activities. In this study hydrostatic extrusion, as a quite rarely applied technique, was used for deformation of commercial magnesium alloys at 100 °C, which is significantly below the temperature necessary for activation of new gliding systems. All experiments were carried out using typical industrial extrusion parameters like extrusion rate and extrusion ratio but with the objective of obtaining extremely fine-grained materials as are received typically from equal channel angular extrusion processing. These experiments show that the processing of magnesium alloys is possible even at a temperature of 100 °C. The limitations of this processing and the influence of process parameters on the microstructure and mechanical properties of extruded profiles will be discussed.
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References
H. Watanabe, T. Mukai, K. Ishikawa, and K. Higashi, Low Temperature Superplasticity of Fine Grained ZK60 Magnesium Alloy Processed by Equal-Channel-Angular Extrusion,Scripta Mater., 2002,46, p 851–856
A.M. Galiyev, R.O. Kaibyshev, and G. Gottstein, Grain Refinement of ZK60 Magnesium Alloy During Low Temperature Deformation,Magnesium Technology 2002, TMS Annual Meeting, H.I. Kaplan, Ed., February 17–21, 2002 (Seattle, WA), The Materials Society, 2002, p 181–185
C. Sanchez, G. Nussbaum, P. Azavant, and H. Octor, Elevated Temperature Behaviour of Rapidly Solidified Magnesium Alloys Containing Rare Earths,Mater. Sci. Eng., A, 1996,221, p 48–57
K. Savage, J.F. King, and A. van Kooij, Hydrostatic Extrusion of Magnesium,Magnesium Alloys and Their Applications, K.U. Kainer, Ed., Wiley-VCH, Weinheim, Germany, 2000, p 609–614
J. Bohlen, J. Swiostek, W.H. Sillekens, P.J. Vet, D. Letzig, and K.U. Kainer, Process and Alloy Development for Hydrostatic Extrusion of Magnesium,Magnesium Technology 2005, TMS Annual Meeting, N.R. Neelameggham, H.I. Kaplan, and B.R. Powell, Ed., February 13–17, 2005 (San Francisco, CA), The Metals Society, 2005, p 241–247
A.J. Den Bakker, W.H. Sillekens, J. Bohlen, K.U. Kainer, and G. Barton, The Magnextrusco Project: Process and Alloy Development for Hydrostatic Extrusion of Magnesium,Magnesium Alloys and Their Applications, K.U. Kainer, Ed., Wiley-VCH, Weinheim, Germany, 2003, p 324–330
J. Göken, J. Swiostek, D. Letzig, and K.U. Kainer, Damping Measurements of the Magnesium Wrought Alloys AZ31, AZ61 and AZ80 after Indirect and Hydrostatic Extrusion,Materer. Sci. Forum, 2005,482, p 387–390
A. Beck,Magnesium und seine Legierungen, Julius Springer Verlag, Berlin, 1939, in German
E.F. Emley,Principles of Magnesium Technology, Pergamon Press, Oxford, 1966
K.B. Müller, Direct and Indirect Extrusion of AZ31,Magnesium Technology 2002, TMS Annual Meeting, H.I. Kaplan, Ed., February 17–21, 2002 (Seattle, WA), The Materials Society, 2002, p 187–192
N. Ogawa, M. Shiomi, and K. Osakada, Forming Limit of Magnesium Alloys at Elevated Temperatures for Precision Forging,Int. J. Machine Tools Manufact., 2002,42, p 607–614
M.M. Avedesian and H. Baker, Ed.,ASM Specialty Handbook, Magnesium and Magnesium Alloys, ASM International, 1999
J. Bohlen, F. Chmelik, P. Dobron, and F. Kaiser, Orientation Effect on Acoustic Emission During Tensile Deformation of Hot Rolled Magnesium Alloy AZ31,J. Alloys Compd., 2004,378, p 207–213
J. Swiostek, J. Bohlen, D. Letzig, and K.U. Kainer, Comparison of Microstructure and Mechanical Properties of Indirect and Hydrostatic Extruded Magnesium Alloys,Magnesium Alloys and Their Applications, K.U. Kainer, Ed., Wiley-VCH, Weinheim, Germany, 2003, p 278–284
J. Chapman and D.V. Wilson, The Room-Temperature Ductility of Fine-Grain Magnesium,J. Inst. Met., 1962–1963,91, p 39–40
K. Müller,Grundlagen des Strangpressens, Expert-Verlag, 2003, in German
G. Fischer,Documentation of the Conference “Magnesium im Fahrzeugbau,” IIR Deutschland GmbH, Sindelfingen Germany, 2003
V. Kree, J. Bohlen, D. Letzig, and K.U. Kainer, The Metallographical Examination of Magnesium Alloys,Pract. Metallogr., 2004,5, p 233–246
C.H.J. Davies, F. Xiong, and M. Battaini, Anisotropic Mechanical Properties of Extruded Magnesium Alloy AZ31,Magnesium Alloys and Their Applications, K.U. Kainer, Ed., Wiley-VCH, Weinheim, Germany, 2003, p 433–438
P.G. Partrige, The Crystallography and Deformation Modes of Hexagonal Close-Packed Metals,Met. Mater., 1967,1, p 169–194
W.H. Sillekens, J.A.F.M. Schade van Westrum, A.J. den Bakker, and P.J. Vet, Hydrostatic Extrusion of Magnesium: Process Mechanics and Performance,Mater. Sci. Forum Vols., 2003,426–432, p 629–636
M.R. Barnett, Z. Keshavarz, A.G. Beer, and D. Atwell, Influence of Grain Size on the Compressive Deformation of Wrought Mg-3Al-1Zn,Acta Mater., 2004,52, p 5093–5103
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Swiostek, J., Göken, J., Letzig, D. et al. Forming of magnesium alloys at 100 °C by hydrostatic extrusion. J. of Materi Eng and Perform 15, 705–711 (2006). https://doi.org/10.1361/105994906X150722
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DOI: https://doi.org/10.1361/105994906X150722