| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Metallurgy
|
| Presentation Title |
G-6: Anisotropy in Tensile and Charpy Impact Properties of Three API X70 Linepipe Steels for ERW Manufacturing Process |
| Author(s) |
Dong-Kyu Oh, Seung-Hyeok Shin, Byoungchul Hwang |
| On-Site Speaker (Planned) |
Dong-Kyu Oh |
| Abstract Scope |
With the increasing global demand for energy, the exploitation of oil and gas has already extended to remote areas or oceans, which requires high-performance linepipe steels to withstand extreme regions. Over the decades, thermo-mechanical controlled process (TMCP) has been applied to enhance both strength and low-temperature toughness for preventing unexpected failure. However, most API linepipe steels produced by TMCP have mechanical anisotropy because of asymmetric deformation during TMCP. In order to fabricate final product by electrical resistance welding (ERW) in the uniform elongation range, anisotropy should be considered. This study aims to discuss the correlation between microstructures and mechanical properties according to chemical compositions and process parameters for three API X70 linepipe steels for the ERW manufacturing process. The microstructures are characterized using OM, SEM, and EBSD analysis, and tensile and Charpy impact tests are conducted to discuss the correlation between microstructure and anisotropy in mechanical properties. |