About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Failure Analysis of Low-Temperature Impact Toughness in Thick-Section Shipbuilding Steel |
| Author(s) |
Jiang Du, Zichao Wang, Wanlin Wang, Jie Zeng |
| On-Site Speaker (Planned) |
Jiang Du |
| Abstract Scope |
Low-temperature impact toughness is a critical performance indicator for thick-section shipbuilding steels used in harsh marine environments. This study investigated the causes of impact toughness failure in the thick-section shipbuilding steel center at −40 °C. The results indicate that the failure of impact toughness in the center region of the rolled sheet is primarily caused by the microsegregation of Mn and Cr elements, which promotes the formation of banded structure bainite. Compared with the ferrite and pearlite matrix, bainite is a harder phase that tends to crack under impact loading, serving as a pathway for crack propagation and thereby reducing the impact toughness of the rolled sheet. This work provides insights for process optimization to improve toughness performance in thick-section shipbuilding steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Iron and Steel, Phase Transformations |