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Two different bainitic structures are observed in a steel depending on the sample
heat treatment. The different types of bainitic structures exhibit different orientation
relationships between cementite and the ferrite matrix. Upper bainite presents a Pitsch
orientation relationship and lower bainite presents a Bagaryatski orientation relationship.
Different heat treatments of low carbon HSLA steel samples have been studied using TEM in
order to find the orientation relationship between the ferrite and carbide in the different bainitic
structures and to determine if this relationship can identify the type of bainitic structure.
CitacióIllescas, S. [et al.]. TEM Study of the Orientation Relationship Between Cementite and Ferrite in a Bainitic Low Carbon High Strength Low Alloy Steel. A: Electron Microscopy and Analysis Group and the Nanoscale Physics and Technology Group Conference. "EMAG-NANO 2005". Bristol: Institute of Physics, 2006.