Abstract
The crystal plasticity finite element method (CPFEM) was applied to determine the influence that the kinematic stability of the austenite (γ) phase exerts on the phase-transformation behavior and deformation heterogeneity of duplex stainless steel (DSS) polycrystalline materials showing γ to martensite (α′) transformation during uniaxial tension. A phase-transformation model was implemented in the CPFEM to consider the effect of transformation-induced plasticity (TRIP) on micromechanical behaviors in DSS. The individual flow curves of the ferrite (α), γ and α′ phases in DSS were determined via in-situ neutron diffraction in combination with the CPFEM. The effect of the kinematic stability of the γ phase on phase-transformation behavior and deformation heterogeneity in DSS during uniaxial tension was demonstrated using the CPFEM based on the representative volume elements (RVEs) of a unit cell for DSS.
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