Fracture behaviour of a Fe–22Mn–0.6C–0.2V austenitic TWIP steel

摘要: Abstract The mechanical behaviour of a 22Mn–0.6C–0.2V austenitic TWIP steel has been extensively characterised for variety strain ratios (from shear to biaxial stretching) using smooth and notched specimens. A constitutive model involving non-isotropic yield function together with isotropic and/or kinematic hardening satisfactorily represented the experimental database. It was used estimate local stress fields derive fracture criterion based on equivalent Lode angle that were expressed be consistent equations describing plastic flow behaviour. weak dependence hydrostatic further improves prediction initiation, an average standard error less than 5% over ten different tests.