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首页> 外文期刊>Journal of Materials Research >Mechanical enhancement of an aluminum layer by graphene coating
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Mechanical enhancement of an aluminum layer by graphene coating

机译：通过石墨烯涂层机械增强铝层

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In this paper, mechanical characteristics of the aluminum layer coated with graphene are investigated by performing numerical tensile experiments through classical molecular dynamics simulations. Based on the results of the simulations, it is shown that coating with graphene enhances the Young's modulus of aluminum by 88% while changing the tensile behavior of aluminum with hardening-softening mechanisms and significantly increased toughness. Furthermore, the effect of loading rate is examined and a transformation to an amorphous phase is observed in the coated aluminum structure as the loading rate is increased. Even though the dominant component of the coated hybrid structure is the aluminum core in the elastic region, the graphene layer shows its effects majorly in the plastic region by a 60% increase in the ultimate tensile strength. High loading rates at room temperature cause the structure transforms to an amorphous phase, as expected. Thus, effects of loading rate and temperature on amorphization are investigated by performing the same simulations at different strain rates and temperatures (i.e., 0, 300, and 600 K).
机译：本文通过经典的分子动力学模拟进行数值拉伸实验，研究了石墨烯覆盖的铝层的力学性能。根据模拟结果，表明用石墨烯涂层可将铝的杨氏模量提高88％，同时通过硬化软化机制改变铝的拉伸性能并显着提高韧性。此外，检查了负载速率的影响，并且随着负载速率的增加，在涂覆的铝结构中观察到了无定形相的转变。即使涂层混合结构的主要成分是弹性区域中的铝芯，但石墨烯层仍会在塑料区域中显示出最终抗拉强度提高60％的效果。如预期的那样，室温下的高加载速率会导致结构转变为非晶相。因此，通过在不同的应变速率和温度（即0、300和600K）下进行相同的模拟，研究了加载速率和温度对非晶化的影响。

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