Static strain aging behavior of an X100 pipeline steel

The effect of static strain aging on the microstructure and mechanical properties of an industrially produced X100 pipeline steel was investigated. It was found that strain aging plays an important role in the tensile property and features of stress–strain curves, with the increase of either pre-strain or aging temperature, the strength increases while elongation decreases. The impact toughness was considerably affected by strain aging only for a pre-strain of 3%, which has a very low fraction of high-angle grain boundaries.