|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||On the Role of Nb on the Texture and Microstructure of a Novel As-rolled Medium Carbon Wear Resistant Slurry Pipeline Steel
||Vahid Javaheri, Tun Tun Nyo, David Porter, Satish Kumar Kolli
|On-Site Speaker (Planned)
||Satish Kumar Kolli
A combination of X-ray diffraction and field emission scanning electron microscopy equipped with EBSD has been employed to evaluate the role of Nb on the evolution of the microstructure and texture of a novel thermomechanically processed low-alloy, medium-carbon steel. Specimens were subjected to hot-rolling with a total reduction of 80%, four passes in the recrystallization regime and four passes below the non-recrystallization temperature. Immediately after rolling, the strips were quenched to 420oC and subsequently cooled slowly in a furnace to simulate strip coiling with transformation of austenite to bainite. The results showed that Nb microalloying results in a finer microstructure with a sharper texture when compared to an identical steel but without Nb. However, volume fraction of components revealed the Nb addition caused an increase of intensity of undesired components like rotated cube. The addition of Nb increased strength and impact toughness both parallel and perpendicular to the rolling direction.