The effects of roller temperature on the microstructure and mechanical properties of a 3xxx serie aluminum alloy sheet were studied. Three temperature settings, namely, traditional rolling with low roller temperature (LTR), high roller temperature (HTR), and differential temperature rolling (DTR): different temperature of upper and lower rollers, were performed. The results reveal that among the three routes, the DTR introduces an internal shear strain, which significantly promotes the dynamic recrystallization and grain refinement. Moreover, a texture optimization from the rolling texture of {112} <111> to {001} <120> texture can be observed. The newly-formed {001} <120> texture has a high Schmid factor in both rolling and transverse direction (RD and TD), which contributes mostly to the improvement of the mechanical anisotropy. Compared to the LTR and HTR samples, the mechanical properties (tensile strength, yield strength and elongation) of the DTR samples in RD and TD are closer, which results in a significantly higher Erichsen value of 6.85 even without annealing. In addition, the combined experimental and calculation results indicate that the DTR sample also maintain a high yield strength due to a higher recrystallization degree and grain boundary strengthening effect. The mechanical anisotropy can be reduced by controlled grain refinement, dynamic recrystallization and texture optimization through DTR without sacrificing the strength.

研究了辊温度对3xxx系列铝合金板材的组织和力学性能的影响。进行了三种温度设置，即传统的低辊温度（LTR）轧辊，高辊温度（HTR）和差温轧辊（DTR）：上下辊的温度不同。结果表明，在这三种途径中，DTR引入了内部剪切应变，从而显着促进了动态再结晶和晶粒细化。此外，可以观察到从{112} <111>的滚动纹理到{001} <120>纹理的纹理优化。新形成的{001} <120>织构在滚动方向和横向方向（RD和TD）上均具有较高的Schmid因子，这在很大程度上有助于改善机械各向异性。与LTR和HTR样品相比，DTR样品在RD和TD中的机械性能（拉伸强度，屈服强度和伸长率）更接近，即使不进行退火，其Erichsen值也显着更高，为6.85。此外，结合实验和计算结果表明，DTR样品还具有较高的再结晶度和晶界强化效果，从而保持了较高的屈服强度。通过控制晶粒细化，动态再结晶和通过DTR进行纹理优化，可以在不牺牲强度的情况下降低机械各向异性。85即使没有退火。此外，结合实验和计算结果表明，DTR样品还具有较高的再结晶度和晶界强化效果，从而保持了较高的屈服强度。通过控制晶粒细化，动态再结晶和通过DTR进行纹理优化，可以在不牺牲强度的情况下降低机械各向异性。85即使没有退火。此外，结合实验和计算结果表明，DTR样品还具有较高的再结晶度和晶界强化效果，从而保持了较高的屈服强度。通过控制晶粒细化，动态再结晶和通过DTR进行纹理优化，可以在不牺牲强度的情况下降低机械各向异性。