About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Process Metallurgy
|
| Presentation Title |
Study on the thermal stress and thermal crack formation behaviors in ferritic-silicon steels and austenitic manganese steels |
| Author(s) |
Yeon-Seok Kim, Soo-Hyun Kim, Chang-Gon Jeong, Kyungchul Cho, Jae Sang Lee, Yoon-Uk Heo |
| On-Site Speaker (Planned) |
Yeon-Seok Kim |
| Abstract Scope |
Since the fracture of slabs by thermal crack initiation leads to significant economic losses, it is necessary to understand the thermal crack formation mechanism. This study investigated the thermal stress and thermal crack formation behaviors in ferrite and austenite matrices, which hold representative crystal structures in steels. The thermal stresses in high-Si and high-Mn steels were obtained with the thermomechanical simulator during the temperature drop. The temperature-dependent tensile curves of both alloys were obtained to understand the thermal stress formation behavior in the temperature range of 25~800°C. The microstructure and deformation structure of the tested specimens were characterized by the SEM, EPMA, ECCI and TEM to investigate the thermal crack initiation mechanism. High-Si steel shows higher thermal stress and higher thermal crack susceptibility than high-Mn steel. The origin of different thermal stress build-up and thermal crack formation behaviors will be discussed based on the results of this study. |