不同压下量对波纹辊轧制铜/铝复合板微观组织及力学性能的影响

波纹辊冷轧粘合（CCRB）作为一种新型轧制工艺，在金属复合板的制备过程中受到广泛关注，但不同压下量下波纹复合板的力学性能及界面的微观形貌尚不明确。采用数值模拟和实验方法，研究了在55%、60%、65%和70%压下量下制备铜/铝波纹复合板的情况。通过ABAQUS有限元模拟仿真软件建立三维模型，模拟了轧制过程中的应力和应变曲线。通过扫描电子显微镜、电子背散射衍射、X射线能谱仪等方法研究了波纹复合板界面形貌。结果表明，复合板的极限抗拉伸强度和剪切强度在65%压下量下达到最大值，分别为221.08和79 MPa，在55%压下量下达到最小值，分别为169.34和45 MPa。在65%和70%压下量下，由于剧烈的塑性变形作用，复合板形成拉长的晶粒和细小的等轴晶。但70%压下量下，由于轧制力过大，基体金属产生微裂纹，导致拉伸性能下降，这与力学实验结果一致。

Influence of Reduction Levels on Microstructure and Me-chanical Properties of Rolled Cu/Al Corrugated Composite Plates

The corrugated cold rolling bonding (CCRB) process, as a new rolling technique, has gained widespread attention in the preparation of metal composite plates. However, the mechanical properties of corrugated composite plates and the microstructure of the interface at different reduction levels are not yet clear. Numerical simulation and experimental methods were employed to investigate the preparation of Cu/Al corrugated composite plates under reduction levels of 55%, 60%, 65%, and 70%. A three-dimensional model was established by finite element simulation software ABAQUS to simulate the normal stress and strain curves during the rolling process. The interface morphology of the composite plate was characterized by scanning electron microscopy, electron backscatter diffraction, and X-ray energy dispersive spectroscopy. Results show that the ultimate tensile strength and shear strength reach the maximum values at a reduction level of 65%, measuring 221.08 and 79 MPa, respectively; while they reach the minimum values at a reduction level of 55%, measuring 169.34 and 45 MPa, respectively. Particularly, at reduction levels of 65% and 70%, the composite plate exhibits elongated grains and fine equiaxed grains due to severe plastic deformation. At a reduction level of 70%, excessive rolling force causes microcracks in the matrix metal, leading to a decrease in tensile performance, which is consistent with the mechanical test results.