Slip Propagation Over the Grain Boundaries at Plastic Deformation of Fe‐3% Si Alloy

Abstract

AbstractThe behaviour of slip bands on the boundaries between grains 5–10 mm in size is studied for an Fe‐3% Si alloy. The samples are deformed at room temperature by bending with a velocity of ∼ 10−5 cm · s−1. The dislocations in the slip bands are made visible by etching. It is found that the propagation of slip bands over the grain boundaries takes place by the nucleation of slip bands in the neighbouring grains. Nucleation occurs near a boundary, opposite the place where the dislocations accumulate on the opposite side of the boundary. Nucleation is caused by the additional stress from the accumulated dislocations.