【摘要】 对GZ31板材在室温和不同压下量条件下进行Erichsen杯突试验，获得4个杯突值分别为2.0、4.1、7.1和7.3 mm的样品。利用OM、SEM和EBSD技术手段研究杯突试验时样品的变形机理和断裂机理。结果表明，非基面织构的GZ31轧制板材杯突值可达7.3 mm。在杯突过程中，基面、锥面滑移以及{10■2}拉伸孪生是主要的变形方式。位错滑移受到第二相颗粒以及晶界阻碍，相互缠结形成微孔，最后导致材料的断裂。GZ31板材杯突值高是因为弱的非基面织构以及稀土元素有利于位错滑移和拉伸孪生去协调变形。更多还原

【Abstract】 An Erichsen cupping test of GZ31 sheet at room temperature with different reductions was carried out, and four samples with IEs(Erichsen index) of 2.0, 4.1, 7.1, and 7.3 mm were obtained. The deformation and fracture mechanisms of the cupping deformation process were studied by OM, SEM and EBSD. The results show that the IE of the GZ31 rolled sheet with the non-basal texture can reach 7.3 mm. Basal and pyramidal dislocation slips and {10■2}extension twinning are the main deformation modes during the Erichsen cupping test. The dislocation slip is hindered by the second phase particles and grain boundaries and entangles with each other to form voids, which eventually leads to the fracture of the material. The reason for the GZ31 sheet showing high IE is that the weak non-basal texture and rare earth elements are favorable for dislocation slip and extension twining to coordinate deformation.更多还原