Effect of Mg content on Portevin-Le Chatelier band strain in Al-Mg sheet alloys

Experimental measurements of stress drops and band strains in type-B Portevin-Le Chatelier (PLC) bands were carried out for 5xxx series Al-Mg sheets with Mg content between 1.8 and 4.5 wt%. While the stress drops increase with global strain, the band strain values in all the samples follow a common linear relationship with global strain. The results indicate that the type-B PLC band strain is independent of solute content at given strain rate.