| 열연 590FB강의 일축인장 시 미소역학적 변형거동 및 파괴거동에 미치는 베이나이트의 강도계수의 영향 |
| 김은영1, 김성일2, 최시훈1,* |
1순천대학교 인쇄전자공학과
2POSCO 기술연구소 박판연구그룹 |
| Effect of Strength Coefficient of Bainite on Micromechanical Deformation and Failure Behaviors of Hot-Rolled 590FB Steel during Uniaxial Tension |
| Eun-Young Kim1, Sung Il Kim2, Shi-Hoon Choi1,* |
1Department of Printed Electronics Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
2Sheet Products & Process Research Group, POSCO Technical Research Laboratories, Gwangyang 57807, Republic of Korea |
|
|
|
Received: 2 February 2016; Accepted: 19 May 2016. Published online: 5 November 2016. |
|
|
| |
| 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 KB 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. |
| Keywords:
ferrite-bainite dual phase steel, metals, deformation, fracture, optical microscopy |
|
|
|
PDF Links
Full text via DOI
Download Citation 
Print 
