Abstract
Magnesium alloy sheet metal is potentially attractive for use in automotive structural applications due to its high strength-to-weight ratio. However, application has been hindered by the low room-temperature formability of typical sheet alloys. One approach to effectively increase formability is to change the forming process from one which involves a single stamping hit to one which utilizes two hits plus an intemediate anneal (i.e., “preform anneal process” ). The purpose of the intermediate anneal is to restore some of the softness and ductility which were reduced by deformation during the first hit.
In this report, the preform annealing behavior of three rolled magnesium alloy sheets was studied using uniaxial tensile tests. The sheets studied were: conventionally rolled (CR) AZ31B, CR ZEK100, and specially rolled (SPR) AZ31B. The preform annealing process was found to increase the total elongation of all three sheets compared to the elongation in the annealed O-temper. The CR ZEK100 with a thickness of 1.5 mm showed more attractive tensile properties than the 1.6 mm CR AZ31B. Although the SPR AZ31B has a thickness of only 0.7 mm, it still has elongation comparable to the 1.6 mm CR AZ31B
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Min, J., Carter, J.T., Verma, R. (2012). Tensile Properties Of Three Preform-Annealed Magnesium Alloy Sheets. In: Mathaudhu, S.N., Sillekens, W.H., Neelameggham, N.R., Hort, N. (eds) Magnesium Technology 2012. Springer, Cham. https://doi.org/10.1007/978-3-319-48203-3_79
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DOI: https://doi.org/10.1007/978-3-319-48203-3_79
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