An adiabatic shear band is a localized deformation band that forms in materials under high strain rate and high-pressure conditions. It is characterized by a highly localized region of intense deformation that occurs over a very short time period, typically on the order of microseconds. The deformation process occurs so rapidly that there is insufficient time for heat to transfer out of the affected region, resulting in a significant temperature rise. Adiabatic shear bands can have a significant impact on the mechanical properties of the material and can lead to catastrophic failure under high-stress conditions.