Rights statement: 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
Accepted author manuscript, 1.18 MB, PDF document
Available under license: CC BY-NC-ND
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Mechanical behavior of Mg subjected to strain path changes
T2 - Experiments and modeling
AU - Wen, W.
AU - Borodachenkova, M.
AU - Tomé, C.N.
AU - Vincze, G.
AU - Rauch, E.F.
AU - Barlat, F.
AU - Grácio, J.J.
N1 - 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
PY - 2015/10/1
Y1 - 2015/10/1
N2 - 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.
AB - 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.
KW - Constitutive behaviour
KW - Microstructures
KW - Strain path change
KW - Polycrystalline material
KW - Mechanical testing
U2 - 10.1016/j.ijplas.2014.10.009
DO - 10.1016/j.ijplas.2014.10.009
M3 - Journal article
VL - 73
SP - 171
EP - 183
JO - International Journal of Plasticity
JF - International Journal of Plasticity
SN - 0749-6419
ER -