Bauschinger effect

The Bausch Inger effect (named after Johann Bauschinger ) is the direction of certain change in the elastic limit of a (polycrystalline) metal or alloy after primary plastic deformation. A metal is deformed in a first direction, so that it is plastically deformed, and is then deformed in the opposite direction, as the elastic limit in the opposite direction is lower. This is due to the repelling forces of pent-up dislocations ( defects or impurities ) in the material.

Bausch Inger effect corresponds to an elastic-plastic element model of a parallel spring and damper, and a further spring, which is connected in series therewith.