About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development IV
|
| Presentation Title |
1.8 GPa class steel sheet with the elongated pearlite similarly observed in music wire |
| Author(s) |
Rintaro Ueji, Hidetoshi Somekawa, Akinobu Shibata, Tsubasa Tokuzumi |
| On-Site Speaker (Planned) |
Rintaro Ueji |
| Abstract Scope |
Ultrahigh tensile strength steel sheet with the characteristic nanostructure typically found in music wire was fabricated successfully by flat cold rolling. The 0.53 wt.%C (SAE9254) spring steel plate with almost fully pearlite structure was prepared by austenitization followed by air cooling, and subsequently flat rolling to a reduction in thickness of 91% was conducted at room temperature to obtain the sheet with a thickness of 1.2 mm and a width of ~150 mm. This sheet exhibits fine elongated pearlite structure and performs high tensile strength of around 1.8 GPa in the rolling direction and also in the transverse direction. Additionally, the sheet is capable to be elongated plastically to around 5 %. The additional mechanical properties such as the fracture behaviors by miniaturized Charpy impact loading and the dependence on uniaxial stress polarity of yield stress will be presented with the discussion about the relation to the directional lamellar structure. |