Despite the high demand for industrial applications of magnesium, the forming technology for wrought magnesium alloys is not fully developed due to the limited ductility and high sensitivity to the processing parameters. The processing window for magnesium alloys could be significantly widened if the lower-bound ductility (LBD) for a range of stresses, temperature, and strain rates was known. LBD is the critical strain at the moment of fracture as a function of stress state and temperature. Measurements of LBD are normally performed by testing in a hyperbaric chamber, which is highly specialized, complex, and rare equipment. In this paper an alternative approach to determine LBD is demonstrated using wrought magnesium alloy AZ31 as an example. A series of compression tests of bulge specimens combined with finite element simulation of the tests were performed. The LBD diagram was then deduced by backward calculation.
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July 2007
Technical Papers
Determination of Lower-Bound Ductility for AZ31 Magnesium Alloy by Use of the Bulge Specimens
Rimma Lapovok,
Rimma Lapovok
Department of Materials Engineering,
Monash University
, VIC 3800 Australia
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Peter D. Hodgson
Peter D. Hodgson
Centre for Material and Fibre Innovation,
Deakin University
, Geelong, VIC 3217 Australia
Search for other works by this author on:
Rimma Lapovok
Department of Materials Engineering,
Monash University
, VIC 3800 Australia
Peter D. Hodgson
Centre for Material and Fibre Innovation,
Deakin University
, Geelong, VIC 3217 AustraliaJ. Eng. Mater. Technol. Jul 2007, 129(3): 407-413 (7 pages)
Published Online: December 8, 2006
Article history
Received:
April 13, 2006
Revised:
December 8, 2006
Citation
Lapovok, R., and Hodgson, P. D. (December 8, 2006). "Determination of Lower-Bound Ductility for AZ31 Magnesium Alloy by Use of the Bulge Specimens." ASME. J. Eng. Mater. Technol. July 2007; 129(3): 407–413. https://doi.org/10.1115/1.2744400
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