Effects of electropulsing treatment (EPT) on the microstructural evolution and mechanical properties of a cold-rolled 316L austenitic stainless steel with nano-lamellar structure were investigated. The EPT experiments were carried out with the electric current direction along the rolling direction (RD) and the transverse direction (TD) of the samples, respectively. Significant anisotropic electroplastic effects for the RD and TD specimens, i.e., reduced hardness/strength and enhanced ductility, were obtained owing to the different recrystallization behaviors of the RD and TD specimens during EPT. The RD specimens after EPT with larger recrystallized grain size and higher volume fraction of recrystallization show lower strength and higher elongation than that of the TD specimens. The main reason might be attributed to the change of the current direction in the two kinds of samples, which results in the different sensitivity of the microstructures to thermal and athermal effects during EPT.

研究了电脉冲处理（EPT）对具有纳米层状结构的冷轧316L奥氏体不锈钢的显微组织演变和力学性能的影响。EPT实验分别沿样品的轧制方向（RD）和横向（TD）的电流方向进行。由于RD和TD样品在EPT期间的不同再结晶行为，导致RD和TD样品具有显着的各向异性塑性效应，即降低了硬度/强度并增强了延展性。EPT后的RD试样比TD试样具有更大的再结晶晶粒尺寸和更高的再结晶体积分数，显示出更低的强度和更高的伸长率。