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Hydro‐mechanical Deep Drawing of Rolled Magnesium Sheets
Author(s) -
Bach FriedrichWilhelm,
Behrens BerndArno,
Rodman Michael,
Vogt Oliver,
Roßberg Arne
Publication year - 2005
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200506119
Subject(s) - deep drawing , ductility (earth science) , materials science , metallurgy , lubrication , isotropy , microstructure , homogeneous , magnesium alloy , work (physics) , alloy , mechanical engineering , composite material , engineering , thermodynamics , creep , physics , quantum mechanics
Magnesium sheets offer high specific properties which make them very attractive in modern light weight constructions. The main obstacles for a wider usage are their high production costs, the poor corrosion properties and the limited ductility. Until today, forming processes have to be conducted at temperatures well above T = 220 °C. In the first place, this is a cost factor. Moreover, technical aspects, such as grain growth or the limited use of lubrication speak against high temperatures. The first aim of the presented research work is to increase the ductility at lower temperatures by alloy modification and by an adapted rolling technology. The key factor to reach isotropic mechanical properties and increased limit drawing ratios in deep drawing tools, is to achieve fine, homogeneous microstructures. This can be done by cross rolling at moderate temperatures. The heat treatment has to be adapted accordingly. In a second stage, hydro‐mechanical deep drawing experiments were carried out at elevated temperature. The results show that the forming behaviour of the tested Mg‐alloys is considerably improved compared to conventional deep drawing.