Abstract
The SEM/electron back scattered diffraction and serial sectioning procedure have been used to study the five parameter description of grain boundaries in a polygonal ferrite microstructure of 9Cr-1Mo steel. A routine has been evolved to correlate the successive images of a selected region and determine the grain boundary plane morphology. The relative misorientation of the crystallites, in terms of misorientation angle-axis (ω,ȓ), the grain boundary inclination angles [azimuth (γ) and polar (β) angles], and the crystallographic description of the two meeting planes have been studied and compared with random distribution. The low-angle boundaries are found to be persistently present in higher amounts after the grain growth induced by extended annealing.
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Acknowledgments
The authors wish to express their gratitude to Dr. M. Vijayalakshmi, Associate Director, Physical Metallurgy Group, and Dr. T. Jayakumar, Former Director, Metallurgy and Materials Group, for their support and encouragement to this work.
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Dash, M.K., Karthikeyan, T. & Saroja, S. Five-Parameter Grain Boundary Determination in Annealed Ferrite Structure Using Electron Backscatter Diffraction and Serial Sectioning Technique. Trans Indian Inst Met 70, 133–143 (2017). https://doi.org/10.1007/s12666-016-0868-x
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DOI: https://doi.org/10.1007/s12666-016-0868-x