The quenching and partitioning (QP) steels have received much attention due to its high strength and good ductility, which results from deformation induced martensitic transformation (DIMT). However, due to the stress state, temperature and strain rate dependent DIMT behavior, the DIMT related flow behavior of QP steels might be more complex than other advanced high strength steels (AHSS) without martensitic transformation. During forming process of such materials (non-linear loading process), effects of DIMT behavior and DIMT related flow behavior on springback prediction are still unknown. In this paper, we focused on the martensitic transformation behavior of QP steels under complex loading (linear loading and cyclic loading). The X-ray diffraction and digital image correlation techniques were performed to monitor the retained austenite evolution and strain history of the specimen, respectively. Then, flow behaviors of QP sheets steels subjected to complex loading are analyzed and compared with DP980 sheets steels (without DIMT). Finally, modified Yoshida and Uemori model calibrated by two different cyclic loading tests, i.e., tension-compression test and cyclic shear test, are adopted in this study to investigate the stress state dependent DIMT effect on springback prediction. The results show, for QP steels, the DIMT is stress state dependent. Accordingly, compared with DP steels, its flow behavior exhibits remarkable stress state sensitivity. Due to these special DIMT behavior and flow behavior of QP steels, its springback prediction should be treated differently compared with DP steels.

淬火和分隔（QP）钢由于其高强度和良好的延展性而备受关注，这是由于变形诱发马氏体相变（DIMT）引起的。但是，由于应力状态，温度和应变率相关的DIMT行为，QP钢与DIMT相关的流动行为可能比其他未经马氏体转变的高级高强度钢（AHSS）更为复杂。在此类材料的成型过程（非线性加载过程）中，DIMT行为和与DIMT相关的流动行为对回弹预测的影响仍然未知。在本文中，我们重点研究了QP钢在复杂载荷（线性载荷和循环载荷）下的马氏体转变行为。进行了X射线衍射和数字图像相关技术，以分别监测样品的残余奥氏体演变和应变历史。然后，分析了承受复杂载荷的QP钢板的流动行为，并将其与DP980钢板（无DIMT）进行了比较。最后，采用修正的吉田模型和植森模型，通过两种不同的循环载荷试验（即拉压试验和循环剪切试验）进行了校准，以研究应力状态相关的DIMT对回弹预测的影响。结果表明，对于QP钢，DIMT与应力状态有关。因此，与DP钢相比，其流动行为表现出显着的应力状态敏感性。由于这些特殊的DIMT行为和QP钢的流动行为，