The mechanical properties of microalloyed steels used in pipelines are strongly affected by microstructure. In this paper, X-ray diffraction (Rietveld method) was used to quantify the microstructure — specifically domain size, microstrain and preferred orientation — for four X80 steels and three experimental X100 steels. Measurements were made at the surface and at several positions below the surface. Nano-sized domains were obtained for all steels tested. A smaller domain size, higher microstrain and stronger preferred orientation were observed in the X100 samples relative to the X80 steels.
- International Petroleum Technology Institute and the Pipeline Division
Characterization of Microstructure in High Strength Microalloyed Steels Using Quantitative X-Ray Diffraction
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Li, X, Wiskel, JB, Henein, H, Ivey, DG, & Omotoso, O. "Characterization of Microstructure in High Strength Microalloyed Steels Using Quantitative X-Ray Diffraction." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 3. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 445-451. ASME. https://doi.org/10.1115/IPC2008-64643
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