Rights statement: This is the author’s version of a work that was accepted for publication in Acta Materialia. 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 Acta Materialia, 111, 2016 DOI: 10.1016/j.actamat.2016.03.075
Accepted author manuscript, 1.79 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 low carbon steel 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 Acta Materialia. 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 Acta Materialia, 111, 2016 DOI: 10.1016/j.actamat.2016.03.075
PY - 2016/6/1
Y1 - 2016/6/1
N2 - The mechanical response of a low carbon steel under complex strain path changes is analyzed here in terms of dislocation storage and annihilation. The mechanical tests performed are cyclic shear and tensile loading followed by shear at different angles with respect to the tensile axis. The material behavior is captured by a dislocation-based hardening model, which is embedded in the Visco-Plastic Self-Consistent (VPSC) polycrystal framework taking into account the accumulation and annihilation of dislocations, as well as back-stress effects. A new and more sophisticated formulation of dislocation reversibility is proposed. The simulated flow stress responses are in good agreement with the experimental data. The effects of the dislocation-related mechanisms on the hardening response during strain path changes are discussed.
AB - The mechanical response of a low carbon steel under complex strain path changes is analyzed here in terms of dislocation storage and annihilation. The mechanical tests performed are cyclic shear and tensile loading followed by shear at different angles with respect to the tensile axis. The material behavior is captured by a dislocation-based hardening model, which is embedded in the Visco-Plastic Self-Consistent (VPSC) polycrystal framework taking into account the accumulation and annihilation of dislocations, as well as back-stress effects. A new and more sophisticated formulation of dislocation reversibility is proposed. The simulated flow stress responses are in good agreement with the experimental data. The effects of the dislocation-related mechanisms on the hardening response during strain path changes are discussed.
KW - Crystallographic dislocation model
KW - Microstructures
KW - Strain path change
KW - Polycrystalline material
U2 - 10.1016/j.actamat.2016.03.075
DO - 10.1016/j.actamat.2016.03.075
M3 - Journal article
VL - 111
SP - 305
EP - 314
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
ER -