Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel

Materials knowledge system for nonlinear composites

“…to the classical composite theories with the major advances made in recent years in the field of computational mechanics [38]. Computational homogenization includes numerical techniques such as the micromechanical finite element models (e.g., [39][40][41][42][43][44][45]) and the FFT-based methods [46][47][48][49]. More recent developments have included the variational asymptotic method for unit cell homogenization [50].…”

Near-Ac3 austenitized ultra-fine-grained quenching and partitioning (Q&P) steel

“…The excellent mechanical properties of UFG medium Mn steel are associated with their UFG microstructure consisting of retained austenite and ferrite. It has been reported that, in medium Mn steels, the UFG microstructure can be obtained either by intercritical annealing (IA) of the deformed or cold-rolled microstructure [1][2][3] or by a two-stage annealing consisting of austenitization annealing, quenching, and austenite reverted transformation annealing [4].…”

“…Their properties are achieved despite a much lower alloying addition as compared to high Mn twinninginduced plasticity (TWIP) steel. A UFG medium Mn steel typically achieves an ultimate tensile strength (UTS) in excess of 1 GPa and a total elongation (TE) in the range of 30-40% [1][2][3][4]. The excellent mechanical properties of UFG medium Mn steel are associated with their UFG microstructure consisting of retained austenite and ferrite.…”

“…The excellent mechanical properties of UFG medium Mn steel are associated with their UFG microstructure consisting of retained austenite and ferrite. It has been reported that, in medium Mn steels, the UFG microstructure can be obtained either by intercritical annealing (IA) of the deformed or cold-rolled microstructure [1][2][3] or by a two-stage annealing consisting of austenitization annealing, quenching, and austenite reverted transformation annealing [4].Quenching and partitioning (Q&P) processing has also been suggested as a promising method to produce ultra-high strength multiphase steels [5,6]. Seo et al [7,8] previously showed that Q&P processing can successfully be applied to medium Mn steel and that it is an ideal alloy system for Q&P processing due to the suppression of the bainite transformation.…”

Phase-transformation behavior and micromechanical properties of a dual-phase steel after chemical modifications

“…9,10 Recently, researchers obtained the flow curves of the composite phases using micromechanical modelling based on the RVEs selected from a real microstructure. [11][12][13][14][15][16][17][18][19] The flow behavior of a DP steel mainly depends on the properties of ferrite and martensite and the volume fractions of different phases. As steel has the same chemical composition, when modelling heat-treated steels, the model mainly focuses on the effects of strengthening methods and the grain size on the strength of different phases.…”