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首页> 外文期刊>Journal of Manufacturing Processes >Structure, wear and corrosion characterizations of Al/20wt.% Zn multilayered composites fabricated by cross-accumulative roll bonding
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Structure, wear and corrosion characterizations of Al/20wt.% Zn multilayered composites fabricated by cross-accumulative roll bonding

机译：Al / 20wt的结构，磨损和腐蚀特征。通过交叉累积辊粘合制造的％Zn多层复合材料

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摘要

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.
机译：在该研究中，Al / 20重量％。％Zn层压复合材料由交叉累积辊键合（CARB）工艺产生。在碳水化合物工艺的不同通行证下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检查，观察到在碳水化合物过程中，Zn层被缩放，破裂并逐渐分布在Al基质中。拉伸试验结果表明，强度的增量趋势意外地在第六次通过，然后在较高的通过时再次持续，在第八次通过达到275个MPa。样品的耐磨性增加到第四次通过，而它在与期望相反的较高通行证逐渐降低。发现混合模式的磨损，粘附和分层机构控制样品的磨损损伤。在第一次通过时制造的样品的腐蚀电流密度比第八次通过3倍，表明耐腐蚀性的提高。此外，奈奎斯特图显示了归因于形成无源胶片的单个电容环。

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