| Title |
Effect of Strength Coefficient of Bainite on Micromechanical Deformation and Failure Behaviors of Hot-Rolled 590FB Steel during Uniaxial Tension |
| Authors |
김은영(Eun-young Kim); 김성일(Sung Il Kim); 최시훈(Shi-hoon Choi) |
| DOI |
https://doi.org/10.3365/KJMM.2016.54.11.808 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
ferrite-bainite dual phase steel; metals; deformation; fracture; optical microscopy |
| Abstract |
The effect of the strength coefficient (KB) of bainite on micromechanical deformation and failure behaviors of a hot-rolled 590MPa steel (590FB) during uniaxial tension was simulated using the elasto-plastic finite element method (FEM). The spatial distribution of the constituent phases was obtained using a phase identification technique based on optical microstructure. Empirical equations which depend on chemical composition were used to determine the stress-strain relationship of the constituent phases of the 590FB steel. The stress-strain partitioning and failure behavior were analyzed by increasing the KB of bainite. The elasto-plastic FEM results revealed that effective strain in the ferrite-bainite boundaries, and maximum principal stress in fibrous bainite, were enhanced as the increased. The elasto-plastic FEM results also demonstrated that the KB significantly affects the micromechanical deformation and failure behaviors of the hot-rolled 590FB steel during uniaxial tension. (Received February 2, 2016; Accepted May 19, 2016) |