Character of the Dislocation Bands in the (A+B) regime of the   Portevin-Le Chatelier effect in Al-2.5%Mg alloy
  The Portevin-Le Chatelier(PLC) effect has been investigated by deforming Al-2.5%Mg alloy in the strain rate regime where simultaneously two types (type B and type A) of serrations appear in the stress strain curve. Our analysis reveal that in this strain rate regime the entire PLC dynamics for a particular strain rate experiment is governed by a single band which changes its character during the deformation. 
A. Chatterjee, A. Sarkar, P. Barat, P. Mukherjee and N. Gayathri