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A constitutive model for analyzing martensite formation in austenitic steels deforming at high strain rates

Article dans une revue avec comité de lecture
Author
ZAERA, Ramon
207423 Department of Continuum Mechanics and Structural Analysis
RODRIGUEZ-MARTINEZ, J. A.
207423 Department of Continuum Mechanics and Structural Analysis
CASADO, Ana Maria
230298 ANDRITZ Hydro
FERNANDEZ-SAEZ, José
207423 Department of Continuum Mechanics and Structural Analysis
RUSINEK, Alexis
ccPESCI, Raphaël
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]

URI
http://hdl.handle.net/10985/9270
DOI
10.1016/j.ijplas.2011.08.003
Date
2012
Journal
International Journal of Plasticity

Abstract

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 transformation kinetics, and in the softening of each solid phase through the use of a homogenization technique. The model was validated with experimental results of dynamic tensile tests on AISI 304 sheet steel specimens, and their predictions correlate well with the experimental evidence in terms of macroscopic stress–strain curves and martensite volume fraction formed at high strain rates. The work shows the value of considering temperature effects in the modeling of metastable austenitic steels submitted to impact conditions. Regarding most of the works reported in the literature on SIMT, modeling of the martensitic transformation at high strain rates is the distinctive feature of the present paper.

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