About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
Creep and Microstructural Development of a 10% Cr Ferritic/Martensitic Heat Resistant Steel Containing Co and Cu |
| Author(s) |
Du-Hyun Kim, Byeong-Hyeon Lee, Jin-Yoo Suh, Seong Hoon Kim, Woo-Sang Jung, Dong-Ik Kim, Gyeung Ho Kim, Seoung-Ho Lim, Seok Su Sohn, Pyuck-Pa Choi, Jong-Ho Shin, Tae-Ho Lee |
| On-Site Speaker (Planned) |
Jin-Yoo Suh |
| Abstract Scope |
This study aims to enhance the high-temperature properties and creep resistance of 10% Cr ferritic/martensitic steels. By replacing Co with Cu, an alloy was designed to improve high-temperature strength and maintain performance under prolonged exposure to elevated temperatures. Creep tests were conducted for the reference (Cu-free) and modified (Cu-added) steels at 630°C under various stress conditions to evaluate the effect of Cu addition. The Cu-containing steel exhibited superior creep resistance for long-term creep under low stress conditions, especially at 145 MPa, where its life was increased up to 12,733 hours which is 14% improved compared to the Cu-free steel. Microstructural analysis using Electron Back-Scattered Diffraction (EBSD), Transmission electron microscopy (TEM), atom probe tomography (APT), and XRD dislocation density calculation were carried out to discuss the effect of Cu-rich precipitates formed both at the grain boundaries and within the grains. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, High-Temperature Materials, Mechanical Properties |