A constitutive law for the thermo-mechanical modelling of magnesium alloy extrusion

Metal extrusion as one of the production processes for semi-finished products plays an important role for the optimisation of wrought magnesium alloys. A mechanistic approach for the modelling of the coupled deformation and temperature fields is presented here. It accounts for the strain rate and te...

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Bibliographic Details
Published inInternational journal of material forming Vol. 5; no. 4; pp. 325 - 339
Main Authors Ertürk, Serkan, Brocks, Wolfgang, Bohlen, Jan, Letzig, Dietmar, Steglich, Dirk
Format Journal Article
LanguageEnglish
Published Paris Springer-Verlag 01.12.2012
Subjects
CAE) and Design
Computational Intelligence
Computer-Aided Engineering (CAD
Engineering
Machines
Manufacturing
Materials Science
Mechanical Engineering
Original Research
Processes
ALE formulation
Rate effects
Anisotropy
Steady state
Heat transfer
Plasticity
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Summary:Metal extrusion as one of the production processes for semi-finished products plays an important role for the optimisation of wrought magnesium alloys. A mechanistic approach for the modelling of the coupled deformation and temperature fields is presented here. It accounts for the strain rate and temperature dependence of the mechanical properties as well as for the evolution of anisotropy and tension-compression asymmetry of magnesium alloys. In an attempt to calibrate the model parameter, tension and compression tests at different temperatures and strain rates are conducted for two different alloys, namely ZE10 and ZEK100. Extrusion trials are simulated and the predicted results are compared in terms of punch force and temperature history. Conclusions are formulated with respect to the significance of model parameters.
ISSN:1960-6206
1960-6214
DOI:10.1007/s12289-011-1055-6