TY - JOUR
T1 - Large strain cyclic behavior of metastable austenic stainless steel
AU - Geijselaers, Hubertus J.M.
AU - Hilkhuijsen, P.
AU - Bor, Teunis Cornelis
AU - van den Boogaard, Antonius H.
PY - 2015
Y1 - 2015
N2 - Metastable austenitic stainless steel will transform to martensite when subjected to mechanical working. In this research 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.
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.
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.
AB - Metastable austenitic stainless steel will transform to martensite when subjected to mechanical working. In this research 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.
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.
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.
KW - IR-94656
KW - METIS-309442
U2 - 10.1016/j.msea.2015.02.047
DO - 10.1016/j.msea.2015.02.047
M3 - Article
VL - 631
SP - 166
EP - 172
JO - Materials science & engineering A
JF - Materials science & engineering A
SN - 0921-5093
ER -