Explanation
Under the action of high temperature external force, the grains slide relatively along the grain boundary. grain boundary slip is a common phenomenon in creep of metals and alloy. Generally, the grain boundary with an angle of 45 ° to the tensile axis has the largest amount of sliding, while the grain boundary perpendicular to the stress axis has little sliding. Generally, the higher the temperature is, the lower the strain rate is, and the sliding amount of grain boundary increases with the increase of deformation.
Classification
Fundamental of Material Science -> Structural basis of materials