Abstract Corrugated cold roll bonding (CCRB) produces metal composite plate with improved mechanical properties compared with conventional methods, but the interfacial mechanism is not fully understood. Here, Cu/Al composite plate with good plate shape was produced by CCRB, and the bonding mechanism and strength along the corrugated interface were studied by experiments and finite element simulations. The results showed that the average bonding strength of Cu/Al composite plate produced by CCRB was nearly twice that of conventional composite plate at an average reduction of 40% during rolling. Strong friction shear stresses occurred at the interface of the corrugated composite plate, which promoted the plastic deformation of the metals and accelerated the rupture of the brittle interfacial layer. Electron backscattered diffraction analysis showed that higher degrees of grain elongation and refinement occurred in the matrices at the front waist and trough due to the stronger normal and shear stresses. Energy-dispersive spectroscopy line scans showed that the thickest atomic diffusion layer occurred at the front waist. The present combination of experimental and computational analyses provides insights into the underlying mechanism of mechanically improved metal composites prepared by CCRB. Graphic Abstract

中文翻译：

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波纹冷轧复合Cu/Al复合板界面结合机理

摘要 波纹冷轧结合（CCRB）生产的金属复合板与传统方法相比具有更好的机械性能，但界面机制尚不完全清楚。在此，采用CCRB生产出具有良好板形的Cu/Al复合板，并通过实验和有限元模拟研究了沿波纹界面的结合机理和强度。结果表明，CCRB生产的Cu/Al复合板的平均结合强度几乎是常规复合板的两倍，在轧制过程中平均压下量为40%。波纹复合板界面处产生强烈的摩擦剪应力，促进了金属的塑性变形，加速了脆性界面层的破裂。电子背散射衍射分析表明，由于法向应力和剪切应力较强，前腰部和前谷部的基体发生了更高程度的晶粒伸长和细化。能量色散光谱线扫描显示最厚的原子扩散层出现在前腰部。目前实验和计算分析的结合提供了对由 CCRB 制备的机械改进金属复合材料的潜在机制的见解。图形摘要 目前实验和计算分析的结合提供了对由 CCRB 制备的机械改进金属复合材料的潜在机制的见解。图形摘要 目前实验和计算分析的结合提供了对由 CCRB 制备的机械改进金属复合材料的潜在机制的见解。图形摘要