Voronoi Diagram-Based Microstructure Modeling and Micromechanical Analysis of Quenched C35 Steel

In this work, austenite–martensite transformation in a low alloy steel is modeled using Voronoi algorithm. The evolved fraction of martensite is predicted from the geometry of the Voronoi diagram constructed, incorporating nucleation kinetics of martensite and Voronoi algorithm. The obtained results are validated against the Koistinen–Marburger equation. The geometrical properties of evolved martensite phase are identified using the characteristics of Poisson–Voronoi diagram. Finally, the microstructure developed is used to analyze local stress–strain behavior of different phases in the microscale. Results show that higher stress values are distributed in martensite phase and higher strain values are distributed in austenite phase.