In order to further understand high-temperature deformation behavior and its-related mechanical properties, the Portevin–Le Chatelier (PLC) effect in an Fe–19Cr–13Ni–0.2C austenitic stainless steel was investigated using high-temperature digital image correlation (DIC) analysis. Under the tensile testing at temperatures from 473 to 623 K, different types of serrated flow appeared even at a constant applied strain rate, and the type transition took place dynamically in a certain order with deformation time. DIC analysis revealed that the dynamic type transition of the serrated flow obeys the PLC band propagation behavior, and that the transition of the PLC band propagation behavior could be attributed to the PLC band nucleation manner. Numerical modeling also proved that the nucleation manner of PLC band nucleation is determined by the spatial-temporal coupling effect.

为了进一步了解高温变形行为及其相关的力学性能，使用高温数字图像相关 (DIC) 研究了 Fe-19Cr-13Ni-0.2C 奥氏体不锈钢中的 Portevin-Le Chatelier (PLC) 效应） 分析。在473~623 K温度拉伸试验中，即使在恒定的外加应变速率下，也会出现不同类型的锯齿状流动，并且类型转变随着变形时间按一定顺序动态发生。DIC分析表明，锯齿流的动态类型转变服从PLC能带传播行为，PLC能带传播行为的转变可归因于PLC能带成核方式。