FE determination of the plasticity induced during diffusive transformation in the case of nucleation at random locations and instants

Spatio-temporal characteristics of the Portevin–Le Châtelier effect in austenitic steel with twinning induced plasticity

“…Analysis of band kinematics provided a quantitative linkage between band speed and plastic strain. Due to its importance in springback calculations in sheet stamping, Young's modulus was measured with the DIC method in both single loading and periodic loading-unloading tests to explore its sensitivity to plastic strains (Doege et al, 2002;Hoanga et al, 2008). The paper concludes with a summary of the major observations from the experiments and provide some connections between our experimental results and existing theoretical models of the PLC effect.…”

“…The Young's modulus of TRIP steels has been found to vary with strain in cyclic loading-unloading tensile tests (Doege et al, 2002;Hoanga et al, 2008). This behavior was attributed to ''microplastic strains" associated with displacements of mobile dislocations and dislocation line geometry during inelastic deformation (Perez et al, 2005).…”

A numerical modelling of 3D polycrystal-to-polycrystal diffusive phase transformations involving crystal plasticity

“…Our recent works Barbe et al [2005Barbe et al [ , 2008; Hoang et al [2007]; Quey et al [2009] have introduced an alternative methodology, which consists in controlling the transformation kinetics (nucleation and growth following specific evolution laws), and resolve numerically the resulting mechanical interactions between phases. As in other works dedicated to the prediction of TRIP in a diffusively transforming material Leblond et al [1989]; Ganghoffer et al [1993]; Schuh and Dunand [2001]; Taleb and Sidoroff [2003]; Barbe et al [2007], the phases were considered to be homogeneous materials differing only by their compacity density and elastoplastic properties.…”

A semi-theoretical model for transformation plasticity occurred during bainitic transformation

“…Indeed, when metallurgical transformations occur under small external stress lower than the yield stress of the weaker phase (austenite), a supplementary plastic strain is observed (Leblond et al, 1986(Leblond et al, , 1989Fischer et al, 1998;Taleb et al, 2001;Taleb and Sidoroff, 2003;Meftah et al, 2007;Hoang et al, 2008;Moumni et al, 2011). This plastic strain increment is called TRansformation Induced Plasticity (TRIP) and has a significant effect on the distribution of the residual stresses, distortions and mechanical properties (Leblond et al, 1986(Leblond et al, , 1989Taleb et al, 2004;Dan et al, 2008;Tahimi et al, 2012;Deng and Murakawa, 2013;Song et al, 2014).…”

“…This plastic strain increment is called TRansformation Induced Plasticity (TRIP) and has a significant effect on the distribution of the residual stresses, distortions and mechanical properties (Leblond et al, 1986(Leblond et al, , 1989Taleb et al, 2004;Dan et al, 2008;Tahimi et al, 2012;Deng and Murakawa, 2013;Song et al, 2014). In the literature, there are two mechanisms proposed to explain the origin of the TRIP: Magee's mechanism which is proposed for displacive transformations and Greenwood-Johnson's mechanism which is well suitable for the diffusional transformations (Meftah et al, 2007;Hoang et al, 2008). According to Magee, TRIP is due to privileged orientation of martensitic plates during transformation in presence of external stress.…”