About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Stretch Flangeability of Hot-rolled Ti-Nb Microalloyed Steels Containing Tramp Cu, Sn and Sb |
| Author(s) |
Hohyeong Lee, Chang Jae Yu, Sung-Il Kim, Dae Geon Lee, Dong-Woo Suh |
| On-Site Speaker (Planned) |
Hohyeong Lee |
| Abstract Scope |
To reduce CO₂ emissions in steelmaking, the steel industry is increasingly adopting scrap-based production, which inevitably introduces tramp elements into the final products. This study investigates the effect of these tramp elements on stretch flangeability. To this end, alloys were prepared by varying Ti/Nb ratios while systematically adding tramp elements Cu, Sn, and Sb. The hole expansion ratio was measured using specimen with hole fabricated by either mechanical punching or wire-EDM. The Ti-rich alloys showed lower HER than the Nb-rich ones in the punched specimens due to the presence of coarse TiN particles, generating remarkable damage during the hole punching. Furthermore, Sn and Sb intensifies the adverse effects of TiN on HER in punched specimens by segregating at TiN/matrix interfaces. Meanwhile, Cu exhibited minimal impact on HER. These findings highlight the potential of microalloying design to mitigate tramp element-induced degradation in stretch flangeability of high-strength steels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Characterization |