Metadynamic Recrystallization
Metadynamic recrystallization is the seamless continuation of recrystallization nuclei initiated during hot forming immediately after unloading, without additional incubation time.
Physical-Chemical Mechanism of Action
Metadynamic recrystallization occurs when the deformation rate is high enough that recrystallization nuclei grow and adjust continuously during deformation. This happens without a pause or incubation period after unloading.
Metallurgical Relevance & Welding Risks
This process type leads to a fine, homogeneous microstructure with low hardness and increased toughness. It prevents crack formation and improves the mechanical properties of the weld. However, too-fast cooling can interrupt recrystallization, leading to a finer microstructure and reduced toughness.
Workshop Practice & Instructions
To promote metadynamic recrystallization, keep the deformation rate high. This requires continuous movement of the workpiece and an effective cooling concept after deformation. Too-fast cooling can interrupt recrystallization, so it's important to control the cooling rate and ensure it isn't too quick.