Promoting Dynamic Recrystallization of Al-Zn-Mg-Cu Alloy via Electroshock Treatment

The application of high-strength Al-Zn-Mg-Cu alloy is seriously limited because its poor formability. A novel electroshock treatment (EST) technique with low frequency combined tensile deformation was proposed to address the issues plasticity and formability alloy, which could revolutionize conventional plastic forming methods realize near-room temperature complex components. examined in this work figure out how EST affects characteristics dynamic recrystallization during deformation. findings demonstrate that when a current density 30 A/mm² period 5 s, elongation increased by 21.74%, fraction 77.56% compared sample without at far below temperature. electron back scatter diffraction (ESBD) results show after appropriate EST, average grain size decreased from 40 μm μm, distribution more uniform, sample’s boundary angle generally increased, attractive facilitate nucleation growth recrystallization. Additionally, transmission microscopy (TEM) indicate energy motivated migration dislocations interior near boundaries, improving ability dynamically recrystallize ambient enhancing elongation.