Aluminum foil undergoes severe plastic deformation and multiple heat treatments during processing, and the texture characteristics become very identifiable. In this research, textured AA8021 aluminum foil was obtained by adjusting the fabrication process. The anisotropic behavior of aluminum foil was studied by tensile testing. The surface morphology and texture evolution of the aluminum foil were studied before and after tensile testing by means of digital microscopy, optical profilometry and electron backscattered diffraction. The experimental results showed that compared with the samples tested at 0° and 90° to the rolling direction, the samples tested at 45° to the rolling direction exhibited lower yield strengths and flow stresses due to the “soft orientation” of most grains. Additionally, when the aluminum foil was tensile tested at 45° to the rolling direction, the shear bands on the surface of the aluminum foil were long, dense, bent and crossed. The rotation of cube grains caused the aluminum foil matrix to undergo significant geometric hardening, increasing the strain hardening index n. Additionally, the rolling texture improved the anti-thinning ability of the aluminum foil at 45° to the rolling direction, significantly increasing the ultimate strain reached in the 45° direction. These research results provide important theoretical guidance for improving the drawability of aluminum foil box-shaped parts by adjusting the microtexture under industrial conditions.

铝箔在加工过程中经历了剧烈的塑性变形和多次热处理，纹理特征变得非常可辨。本研究通过调整制作工艺获得了织纹AA8021铝箔。通过拉伸试验研究了铝箔的各向异性行为。通过数字显微镜、光学轮廓仪和电子背散射衍射研究了拉伸试验前后铝箔的表面形貌和织构演变。实验结果表明，与轧制方向成 0° 和 90° 测试的样品相比，与轧制方向成 45° 测试的样品由于大多数晶粒的“软取向”而表现出较低的屈服强度和流动应力。此外，铝箔与轧制方向成45°拉伸试验时，铝箔表面剪切带长、致密、弯曲、交叉。立方体晶粒的旋转导致铝箔基体发生显着的几何硬化，增加了应变硬化指数 n。此外，轧制织构提高了铝箔在与轧制方向成45°的抗薄化能力，显着提高了在45°方向上达到的极限应变。这些研究结果为在工业条件下通过调整显微组织来提高铝箔盒形零件的可拉伸性提供了重要的理论指导。立方体晶粒的旋转导致铝箔基体发生显着的几何硬化，增加了应变硬化指数 n。此外，轧制织构提高了铝箔在与轧制方向成45°的抗薄化能力，显着提高了在45°方向上达到的极限应变。这些研究结果为在工业条件下通过调整显微组织来提高铝箔盒形零件的可拉伸性提供了重要的理论指导。立方体晶粒的旋转导致铝箔基体发生显着的几何硬化，增加了应变硬化指数 n。此外，轧制织构提高了铝箔在与轧制方向成45°的抗薄化能力，显着提高了在45°方向上达到的极限应变。这些研究结果为在工业条件下通过调整显微组织来提高铝箔盒形零件的可拉伸性提供了重要的理论指导。