Strain partitioning and damage initiation in a continuously cooled carbide free bainitic steel
نویسندگان
چکیده
Microscopic stress and strain partitioning control the mechanical damage behavior of multiphase steels. Using a combined numerical experimental approach, local distributions deformation localization are characterized in carbide free bainitic steel produced by continuous cooling. The microstructure consists bainite (aggregate ferrite thin film retained austenite), martensite blocky austenite. Numerical simulations were done using von Mises J2 plasticity flow rule also phenomenological crystal material model. representative volume element (RVE) was created realistic 2D geometry captured through Electron Backscatter Diffraction (EBSD). These describe distribution this steel. To validate simulation results, maps obtained experimentally via in-situ tensile testing micro digital image correlation (µDIC) scanning electron microscopy (SEM). information gained from data gave valuable insight regarding microstructural features responsible for initiation results modelling show that martensite, martensite/bainitic interfaces, interface orientation with respect to direction, size phase composition influence
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ژورنال
عنوان ژورنال: Computational Materials Science
سال: 2022
ISSN: ['1879-0801', '0927-0256']
DOI: https://doi.org/10.1016/j.commatsci.2021.110965