Premium
Mean‐field homogenization based constitutive modeling of austenitic TRIP‐steels at the single crystal scale
Author(s) -
Prüger Stefan,
Kiefer Björn
Publication year - 2021
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.202000246
Subject(s) - homogenization (climate) , austenite , materials science , constitutive equation , hardening (computing) , anisotropy , martensite , softening , plasticity , single crystal , crystal plasticity , slip (aerodynamics) , metallurgy , mechanics , composite material , finite element method , thermodynamics , crystallography , microstructure , physics , optics , biodiversity , ecology , biology , chemistry , layer (electronics)
Abstract In order to accurately describe the effective mechanical behavior of single‐crystalline, austenitic TRIP‐steels, a two‐phase mean‐field homogenization scheme is presented in a finite deformation framework, which also includes transformation‐induced eigendeformations. The constitutive behavior of the two phases, namely austenite and martensite, is described by a rate‐independent single‐crystal plasticity model that captures elastic anisotropy as well as anisotropic slip and hardening behavior. The response of the two‐phase model under homogeneous deformation states is investigated and a particle strengthening effect is predicted in the absence of transformation‐induced eigendeformations and a suitable choice of material constants, while upon the inclusion of eigendeformations a gradual stress softening is observed.