Microscheuring
Microscheuring denotes localized shear deformations that occur within the microstructure of a material under mechanical loading. The affected regions are typically on the order of micrometers or smaller and may include individual grains, grain boundaries, phase interfaces, or thin surface layers. The phenomenon is important because it can control the initiation of plastic flow, damage formation, and fatigue behavior before macroscopic yielding is reached.
Mechanisms vary with material class. In crystalline metals, microscheuring commonly involves dislocation glide on specific slip
Observation and measurement rely on high-resolution imaging and micromechanical testing. TEM and high-resolution SEM with in
Implications include effects on yield strength, ductility, crack initiation, and fatigue resistance. Understanding microscheuring supports the
Terminology in the literature is not fully standardized; microscheuring is often described as localized shear or