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On the use of accumulative roll bonding process to develop nanostructured aluminum alloy 5083

机译：关于使用累积辊压粘合工艺开发纳米结构铝合金5083

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摘要

In the present study, the effect of accumulative roll bonding (ARB) process at room temperature on the microstructure and mechanical properties of AA5083 strip was investigated. Microstructural observations were done by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Also, mechanical properties were performed by tensile, hardness, and microhardness tests. It was observed that accumulative roll bonding is a promising process for production of nanostructured (80 ran) AA5083 strips. Nano shear bands were formed in the microstructure after the fourth cycles. When the number of cycles increased, the tensile strength and hardness of the accumulatively roll bonded strips increased. However, by increasing the number of cycles, the elongation value decreased except for the last (sixth) cycle. It was found that when the number of cycles increased, the distribution of microhardness values became more uniform. After the tensile test, debonding can be observed especially in the interface formed in the last cycle. Observations revealed that the failure mode in the accumulatively roll bonded AA5083 strip was a shear ductile rupture with elongated shallow shear dimples.
机译：在本研究中，研究了室温下的累积辊压粘合（ARB）工艺对AA5083带材的组织和力学性能的影响。通过透射电子显微镜（TEM）和扫描电子显微镜（SEM）进行微观结构观察。另外，通过拉伸，硬度和显微硬度测试来执行机械性能。观察到，累积的辊压粘结是用于生产纳米结构的（80 ran）AA5083带的有前途的工艺。第四个循环后，在微观结构中形成了纳米剪切带。当循环次数增加时，累积的辊压粘合条的拉伸强度和硬度增加。但是，通过增加循环次数，伸长率值除最后（第六个）循环外降低。发现当循环数增加时，显微硬度值的分布变得更均匀。拉伸试验后，尤其是在最后一个循环中形成的界面中可以观察到剥离。观察结果表明，累积轧制的AA5083带材的破坏模式为剪切延性断裂，并带有细长的浅剪切凹痕。

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