RX: Recrystallization
Definition:A physical process that removes the deformed structure by generation and motion of high angle grain boundaries during the annealing of deformed materials.
Explanation:There are basically two softening mechanisms that take place during the annealing of deformed materials: recovery and RX. In both processes a rearrangement and removal of dislocations is observed. In recovery, this rearrangement occurs only by dislocation motion. In contrast, RX involves the generation and motion of high angle grain boundaries that remove the deformed structure of a material. In fact, the grain structure is reconstructed during RX. The term RX is commonly used to describe a broad range of physical processes that include the phenomena associated with grain boundary migration that lead to a lower free energy of the crystalline aggregate. The previous definition of RX corresponds to the most important phenomenon among the different RX processes, namely, static primary RX.
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Electron backscatter diffraction (EBSD) maps showing (a) the beginning of RX and (b) the end of RX.
SFB-Link:RX is a process of high industrial relevance because it is used to decrease the strength of a material after plastic deformation with the subsequent gain in ductility and formability. As such, its study and comprehension is vital for the tailoring of manganese steels.
References:G. Gottstein, Physical Foundations of Materials Science, Springer, 2004