Descriptors of temporal signatures of serrations in a low alloy steel

The serrated flow behaviour in a low alloy steel has been analysed with new metrics that captures the signatures of its typical temporal characteristics. It has been found that the temporal manifestation of serrated flow could be decomposed into a slow and fast kinetics framework. The relationship of tensile ductility with the evolving temporal characteristic of in-homogenous flow in the temperature–strain rate regime displaying PLC phenomenon has been explored. The evolutionary behaviour of these descriptors along the flow curve has been related to the unit processes of PLC phenomenon within the framework of the unified model of dynamic strain aging proposed by Beukel and Kocks.