Effects of Asymmetric Rolling with Tilted Material Entry on Texture and Mechanical Properties of Aluminium - research data

Asymmetric rolling texture of aluminium alloy 1050 was examined both experimentally and numerically. The rolling asymmetry was realized using two rolls with different diameters rotating with the same angular velocity and by varying inclination of the rolling strip (i.e., the flat and tilted entry of the rolled strip between rolls). The final deformation of 84% reduction in the thickness was obtained after six consecutive rolling passes. Crystallographic textures distribution over the rolled bar thickness was determined using X-ray diffraction and predicted using the Finite Element Methodology coupled with two crystalline deformation models (i.e., the elasto-plastic and the elasto-viscoplastic ones). The textures predicted by both models are in good agreement with experimental results showing the role of process asymmetry in homogenization of texture distribution.

本研究通过实验与数值模拟两种方法，对1050铝合金的非对称轧制织构开展了系统探究。该研究通过两种方式实现轧制非对称性：其一为采用直径不同且角速度一致的双轧辊；其二为改变轧制带材的入口倾角，即轧辊间带材的平直入口与倾斜入口两种工况。经6道次连续轧制后，最终获得了84%的厚度压下率。通过X射线衍射（X-ray diffraction）表征了轧制棒材厚度方向的晶体织构分布，并采用耦合了两类晶体塑性变形模型（弹塑性（elasto-plastic）模型与粘弹塑性（elasto-viscoplastic）模型）的有限元方法（Finite Element Methodology）完成了织构预测。两类模型的预测结果均与实验结果吻合良好，证实了轧制工艺非对称性对织构分布均匀化的关键调控作用。