Mechanical behavior of Mg subjected to strain path changes : Experiments and modeling

Wen, W. and Borodachenkova, M. and Tomé, C.N. and Vincze, G. and Rauch, E.F. and Barlat, F. and Grácio, J.J. (2015) Mechanical behavior of Mg subjected to strain path changes : Experiments and modeling. International Journal of Plasticity, 73. pp. 171-183. ISSN 0749-6419

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Abstract

Two-step tension tests with reloads along different directions are performed on rolled Mg alloy sheet at room temperature. The experimental yield stress at reloading is systematically lower than before unloading. Such a behavior is captured by a microstructure-based hardening model accounting for dislocation reversibility and back-stress. This formulation, embedded in the Visco-Plastic Self-Consistent (VPSC) model, links the dislocation density evolution throughout the deformation with hardening. The predicted results agree well with the experimental data in terms of flow stress response and texture evolution. The effects of texture anisotropy and back-stress on the mechanical response during the strain path change are discussed.

Item Type:

Journal Article

Journal or Publication Title:

International Journal of Plasticity

Additional Information:

This is the author’s version of a work that was accepted for publication in International Journal of Plasticity. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Plasticity, 73, 2015 DOI: 10.1016/j.ijplas.2014.10.009

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2200/2211

Subjects:

?? constitutive behaviourmicrostructuresstrain path changepolycrystalline materialmechanical testingmechanics of materialsgeneral materials sciencemechanical engineeringmaterials science(all) ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

132451

Deposited By:

ep_importer_pure

Deposited On:

08 Apr 2019 11:45

Refereed?:

Yes

Published?:

Published