A macroscopic constitutive model for a metastable austenitic stainless steel

The Influence of Sample Preparation on the Quantitative Analysis of the Volume Fraction of Martensite Formed in a 304l Trip Steel

“…The austenite-martensite transformation (γ → α') induced by plastic deformation occurs in the range between slightly above room temperature and cryogenic temperatures 1,2 . External stress has the effect of increasing the critical (M s ) temperature 2 .…”

“…External stress has the effect of increasing the critical (M s ) temperature 2 . The temperature range where this type of transformation occurs is between (M s ) and (M d ), where austenite is thermodynamically unstable in presence of stress 1 . This reaction has athermal and adifusional characteristics, and the applied mechanical force increases the Gibbs free energy.…”

Anisotropic plasticity model coupled with Lode angle dependent strain-induced transformation kinetics law

“…The micromechanics-based models make use of separate constitutive equations for the austenitic and martensitic phases (and possibly others) while an evolution law is used to describe the changing phase volume fractions; the effective behavior of the multi-phase material is then computed through homogenization. Several homogenization techniques have been adopted ranging from simple rules of mixtures (e.g., Lecroisey and Pineau, 1972;Hänsel et al, 1998;Hallberg et al, 2007;Santacreu et al, 2006;Post et al, 2008) to more complex homogenization techniques that account for field fluctuations within the phases (e.g., Leblond et al, 1986aLeblond et al, , 1986bLeblond et al, , 1989Leblond, 1989;Stringfellow and Parks, 1991;Stringfellow et al, 1992;Bhattacharyya and Weng, 1994;Diani et al, 1995;Cherkaoui et al, 1998;Papatriantafillou et al, 2004Papatriantafillou et al, , 2006Turteltaub and Suiker, 2005).…”

Validation tool for 2D multi-stage metal-forming processes on meta-stable stainless steels

“…A rate formulation is chosen to incorporate the path dependence. The full phenomenological model of Nanoflex TM is described in Post and Datta (2007). …”