In this study, Al/20 wt.% Zn laminated composites are produced by the cross-accumulative roll bonding (CARB) process. The microstructural, mechanical and corrosion characteristics of the composites are investigated at different passes of the CARB process. Using scanning electron microscopy, it is observed that during the CARB process, the Zn layers are necked, ruptured and gradually distributed in the Al matrix. Tensile testing results reveal that the incremental trend of strength stops unexpectedly at the sixth pass and then continues again at the higher passes, reaching 275 MPa at the eighth pass. The wear resistance of the samples increases up to the fourth pass, whereas it decreases gradually at the higher passes contrary to expectations. A mixed mode of abrasion, adhesion and delamination mechanisms is found to control the wear damage of the samples. The corrosion current density of the samples fabricated at the first pass is 3 times higher than the eighth pass, indicating the improvement of the corrosion resistance. Also, Nyquist plots show a single capacitance loop attributed to the formation of a passive film.

在这项研究中，Al / 20 wt。％Zn层压复合材料是通过交叉累积辊压粘合（CARB）工艺生产的。在CARB工艺的不同过程中研究了复合材料的微观结构，机械和腐蚀特性。使用扫描电子显微镜观察到，在CARB过程中，Zn层出现颈缩，破裂并逐渐分布在Al基体中。拉伸试验结果表明，强度的增加趋势在第六道次意外停止，然后在更高的道次继续上升，在第八道次达到275 MPa。样品的耐磨性一直提高到第四遍，而在更高的遍时则逐渐降低，这与预期相反。混合磨损 发现粘附和分层机制可以控制样品的磨损。第一次通过时制造的样品的腐蚀电流密度是第八次通过时的3倍，表明耐蚀性得到了改善。同样，奈奎斯特图显示了归因于无源膜形成的单个电容环路。