Experimental characterisation and modelling of the thermo-viscoplastic behaviour of steel AISI 304 within wide ranges of strain rate at room temperature
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In this investigation, thermo-viscoplastic behaviour of austenitic steel AISI 304 has been characterised in tension under wide ranges of strain rate at room temperature. This metal possesses an elevated strain hardening rate and ductility which enhance its capability for absorbing energy under mechanical loading. It has been observed that the rate sensitivity of the material is independent of plastic strain. Moreover, it has been noticed that beyond a certain level of loading rate the flow stress of the material sharply increases. In agreement with experimental evidences reported in the literature, this behaviour is assumed to be caused by the drag deformation mode taking place at high strain rates. Based on such considerations, the thermo-viscoplastic behaviour of the material has been macroscopically modelled by means of the extended Rusinek-Klepaczko model to viscous drag effects. Satisfactory matching has been found between the experiments and analytical predictions provided by the constitutive relation.
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Numerical Simulation of the effect adiabatic temperature increase in martensitic transformation of austenitic steels ZAERA, Ramon; CASADO, Alvaro; RODRIGUEZ-MARTINEZ, José A.; RUSINEK, Alexis; PESCI, Raphaël; FERNANDEZ-SAEZ, José (2011)The predictions of the constitutive model agree with experimental results in terms of macroscopy stress-strain curves and volume fraction of martensite formed during loading
Numerical simulation of the effect of adiabatic temperature increase in martensitic transformation of austenitic steels ZAERA, Ramon; CASADO, Alvaro; RODRIGUEZ-MARTINEZ, José Antonio; RUSINEK, Alexis; PESCI, Raphaël; FERNANDEZ-SAEZ, José (2011)This work presents a constitutive model for metastable austenitic steels exhibiting Strain Induced Martensitic Transformation (SIMT). Based on the description of the kinetics of phase transformation proposed by Olson and ...
A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates ZAERA, Ramon; RODRIGUEZ-MARTINEZ, J. A.; CASADO, Ana Maria; FERNANDEZ-SAEZ, José; RUSINEK, Alexis; PESCI, Raphaël (Elsevier, 2012)This study presents a constitutive model for steels exhibiting SIMT, based on previous seminal works, and the corresponding methodology to estimate their parameters. The model includes temperature effects in the phase ...
Mechanical charecterization and analytical modeling of the thermo-viscoplastic behaviour AISI 304 steel under wide ranges of strain rates at room temperature RODRIGUEZ-MARTINEZ, José A.; RUSINEK, Alexis; PESCI, Raphaël; ARIAS, Angel (2010)In this investigation, the thermo-viscoplastic behaviour of the steel AISI 304 has been examined. The experimental characterization of the material has been conducted in tension under wide ranges of strain rates.An analytical ...
Experimental study on the martensitic transformation in AISI 304 steel sheets subjected to tension under wide ranges of strain rate at room temperature RODRIGUEZ-MARTINEZ, J. A.; PESCI, Raphaël; RUSINEK, Alexis (Elsevier, 2011)In this work, the martensitic transformation occurring in AISI 304 steel sheets subjected to tension at room temperature has been experimentally studied. Tensile tests performed on AISI 304 specimens are split into two ...