In situ characterization of microstructural instabilities: Recovery, recrystallization and abnormal growth in nanoreinforced steel powder

An in situ X-ray diffraction experiment was set up to study the microstructural evolution of a nanostructured oxide dispersion-strengthened ferritic steel produced by high-energy ball milling. Dislocation density and grain growth between 20 and 1100°C were quantified by coupling-modified Williamson–Hall and Warren–Averbach methods. During the early stages of heating, recovery through the rearrangement of dislocations increases the coherent …