Effects of deformation conditions on the superplastic deformation behavior of LZ91 Mg-Li alloy under electric field

Abstract. The electro-superplastic effect (ESP effect) can enhance the superplastic deformation ability of alloy, and also make alloy with poor plasticity have properties. Diverse grain sizes LZ91 Mg-Li were successfully prepared through equal channel angular pressing (ECAP) process. In order to explore behavior under electric current, an field assisted uniaxial tensile test platform was designed fabricated. A decreasing constant voltage electrification scheme proposed, experiments different current densities, initial strain rates carried out. results indicate that true strain-stress curve gradually comes steady increase density, presenting a steady-state rheological characteristic. rate has significant on high condition. For fine-grained effectively reduce temperature considerably elongation. This paper enriches understanding action field.