Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1581810 | Materials Science and Engineering: A | 2008 | 11 Pages |
Abstract
In situ neutron diffraction and Elasto-Plastic Self-Consistent (EPSC) polycrystal modelling have been employed to investigate which deformation mechanisms are involved in the plasticity of extruded AZ31 Mg alloy during the tensile loading along the extrusion direction. On the basis of this study we were able to determine the relative activity of the slip and twinning deformation modes. By tuning the parameters of the EPSC model (i.e. the critical resolved shear strengths and hardening parameters), excellent agreement with the experimental data has been achieved. It is shown that the strain in the crystallographic ãcã direction is accommodated mainly by ãc + aã dislocation slip on second-order pyramidal planes. The results further indicate that either slip of ãaã dislocations occurs on {10.1} pyramidal planes or cross-slip from basal and prismatic planes takes place.
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Authors
O. Muránsky, D.G. Carr, M.R. Barnett, E.C. Oliver, P. Å ittner,