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Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy: in situ neutron diffraction and EPSC modelling

Muransky, O., Carr, D., Barnett, M., Oliver, E. and Sittner, P. 2008, Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy: in situ neutron diffraction and EPSC modelling, Materials science and engineering A: structural materials: properties, microstructures and processing, vol. 496, no. 1-2, pp. 14-24.


Title Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy: in situ neutron diffraction and EPSC modelling
Author(s) Muransky, O.
Carr, D.
Barnett, M.
Oliver, E.
Sittner, P.
Journal name Materials science and engineering A: structural materials: properties, microstructures and processing
Volume number 496
Issue number 1-2
Start page 14
End page 24
Publisher Elsevier SA
Place of publication Lausanne, Switzerland
Publication date 2008-11-25
ISSN 0921-5093
1873-4936
Keyword(s) magnesium
deformation mechanisms
plasticity
EPSC modelling
neutron diffraction
Summary 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 ⟨c ⟩direction is accommodated mainly by ⟨c + a ⟩ dislocation slip on second-order pyramidal planes. The results further indicate that either slip of ⟨a ⟩dislocations occurs on {10.1} pyramidal planes or cross-slip from basal and prismatic planes takes place.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2008
Copyright notice ©2008, Published by Elsevier B.V
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017324

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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Citation counts: TR Web of Science Citation Count  Cited 24 times in TR Web of Science
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Created: Fri, 14 Aug 2009, 13:52:07 EST