Cyclic shear behavior of austenitic stainless steel sheet

Cyclic shear behavior of austenitic stainless steel sheet

Bert Geijselaers, Ton Bor, Peter Hilkhuijsen, Ton Van Den Boogaard

Universiteit Twente, Engineering Technology, POBox 217, 7500AE Enschede, Netherlands.

DOI:

https://doi.org/10.7494/cmms.2015.1.0497

Abstract:

An austenitic stainless steel has been subjected to large amplitude strain paths containing a strain reversal. During the tests, apart from the stress and the strain also magnetic induction was measured to monitor the transformation of austenite to martensite. From the in-situ magnetic induction measurements an estimate of the stress partitioning among the phases is determined. When the strain path reversal is applied at low strains, a classical Bauschinger effect is observed. When the strain reversal is applied at higher strains, a higher flow stress is measured after the reversal compared to the flow stress before reversal. Also a stagnation of the transformation is observed, meaning that a higher strain as well as a higher stress than before the strain path change is required to restart the transformation after reversal. The observed behavior can be explained by a model in which for the martensitic transformation a stress induced transformation model is used. The constitutive behavior of both the austenite phase and the martensite is described by a Chaboche model to account for the Bauschinger effect. In the model mean-field homogenization of the material behavior of the individual phases is employed to obtain a constitutive behavior of the two-phase composite. The overall applied stress, the stress in the martensite phase and the observed transformation behavior during cyclic shear are very well reproduced by the model simulations.

Cite as:

Geijselaers, B., Bor, T., Hilkhuijsen, P., & Van Den Boogaard, T. (2015). Cyclic shear behavior of austenitic stainless steel sheet. Computer Methods in Materials Science, 15(1), 13-22. https://doi.org/10.7494/cmms.2015.1.0497

Article (PDF):

Keywords:

Metastable austenite, Deformation induced martensite, Constitutive model

Publication dates:

Received: 10.11.2014, accepted: 17.11.2014, published: 28.12.2014

Publication type:

Original scientific paper

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