| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Metallurgy
|
| Presentation Title |
G-8: Comparative Study on the Role of Phosphorus and Sulfur Grain Boundary Segregation on the Hot Ductility in Low Carbon Steel |
| Author(s) |
Soohyun Kim, Sang Hum Kwon, Jae Sang Lee, Yoon Uk Heo |
| On-Site Speaker (Planned) |
Soohyun Kim |
| Abstract Scope |
Phosphorus and sulfur, as representative impurities, bring grain boundary (GB) embrittlement in steels. The effects of phosphorus and sulfur on the hot ductility in low-carbon steel were systematically investigated in this study. Two groups of low-carbon steels that contain different amounts of phosphorus and sulfur were hot-tensile tested in the temperature ranges of 600 ~ 1000 ℃. All the alloys showed an intergranular fracture at 700 and 800 ℃. However, sulfur-containing alloys showed more brittle behavior than phosphorus-containing alloys. The GB segregations of phosphorus and sulfur were calculated and experimentally identified. Sulfur shows relatively more active GB segregation behavior than phosphorus at high temperatures. Considering the segregation-induced reduction of GB cohesive strength, the role of both impurities on hot ductility was evaluated and further discussed. |