Mechanical behavior of low carbon steel 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. (2016) Mechanical behavior of low carbon steel subjected to strain path changes : Experiments and modeling. Acta Materialia, 111. pp. 305-314. ISSN 1359-6454

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Abstract

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.

Item Type:

Journal Article

Journal or Publication Title:

Acta Materialia

Additional Information:

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

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2500/2507

Subjects:

?? crystallographic dislocation modelmicrostructuresstrain path changepolycrystalline materialpolymers and plasticsmetals and alloysceramics and compositeselectronic, optical and magnetic materials ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

132445

Deposited By:

ep_importer_pure

Deposited On:

09 Apr 2019 13:15

Refereed?:

Yes

Published?:

Published