[SY-F1] Symposium F-1

[SY-F1] Micro structure-based Crystal Plasticity Modeling of of Duplex Titanium Alloy During Hot Deformation

^○Jun Zhang¹, Yang Wang², Yu Wang² (1.Institute of Systems Engineering,China Academy of Engineering Physics, China, 2.Department of Modern Mechanics, CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, China)

A crystal plasticity finite element model (CPFE) is presented to describe the hot deformation of titanium alloy with a duplex microstructure. The model accounts for the individual plasticity slips within both primary α grains and lamellar Widmanstatten grains using a isostress homogenization approach. The finite element model is initial by a random program. The material parameters considering the scale of singal crystal are determined by the combination of interpolation optimization method and the experiment data published in the literature. The numerical results are in good agreement with the experimental tension stress-strain curve at high temperature, indicating that the numerical model is suitable to describe the hot deformation of duplex titanium alloy. The corresponding results give a deep insight into the relationship between the microstructure and macro-mechanical behavior, and provide richer clues for the optimization design of titanium alloy.