|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||Precipitate and texture evolution in a thick-gauge niobium-microalloyed line pipe steel
||Monowar AFM Hossain, Xingshuo Wen, Matthew Enloe, Aaron Litschewski, Murali Manohar, Bertram Ehrhardt, Gregory Thompson, Nilesh Kumar
|On-Site Speaker (Planned)
Advances in processing and improved understanding of microstructural factors controlling mechanical properties have led to development of line pipe steels with high strength and toughness. However, the performance of line pipe steels is being further confronted by demand for thick-gauge steels to transport oil and gas at increasingly higher pressures. One of the challenges is reducing the microstructural heterogeneity through the thickness of heavy-gauge line pipe steels during processing. The focus of this work is on studying the precipitation and texture evolution through thickness in a Nb-microalloyed line pipe steel plate. Scanning electron microscope, transmission electron microscope, and electron backscattered diffraction were used to characterize chemistry and morphology of precipitates and texture. The initial results indicate that the precipitation and texture of the steel are different along the thickness and suggest a need for controlling composition, processing, or both to have uniform microstructure through the thickness of the steel plate.
||Iron and Steel, Characterization, Other