In general, graphene nanoplatelets (GNPs) did not entirely imparted their extraordinary properties to the particulate magnesium matrix composites (PMgMCs) due to the poor wettability between GNPs and Mg matrix alloys as well as presence of agglomerated GNPs. Therefore, in this study, microstructure and mechanical characterizations were used to investigate effect of GNPs content on the microstructural and mechanical properties of AZ80 magnesium alloy. Current study explored the potential and mechanism of GNPs in improvement of mechanical properties of PMgMCs with insight of microstructure. Therefore, AZ80 reinforced by low contents of GNPs (0.1 and 0.6 wt%) were fabricated by rheo casting followed by hot extrusion. Simultaneously enhancement of tensile properties, the strengthening and the fracture strain efficiencies were achieved in AZ80/0.1GNPs composite by cost effectiveness and simple adaptability of manufacture method which results fairly uniform distribution of GNPs. The addition of 0.1 wt% GNPs led to grain refinement (~10%), dynamic recrystallization, stronger basal texture (~750%), more dissolution of β-eutectic phase (~66%) which results more dynamic precipitates (~70%) and reduction of yield asymmetry (~23%). Compared to the AZ80 alloy, the tensile and compressive yield strengths of AZ80/0.1GNPs composite were enhanced by 40% and 15%, respectively. In both tensile and compressive testes, the effective load transfer was the most important strengthening mechanism. Also, the tensile and compressive failure strains of AZ80/0.1GNPs nanocomposite were enhanced by 50% and 37%, respectively. The uniform dispersion of GNPs, increase of non-basal slip, grain refinement, lower eutectic content and smaller discontinuous intergranular precipitates increased failure strain.

通常，由于GNP和Mg基体合金之间的润湿性差以及存在团聚的GNP，石墨烯纳米片（GNP）并未完全赋予颗粒状镁基复合材料（PMgMCs）非凡的性能。因此，在这项研究中，利用显微组织和力学性能研究了GNPs含量对AZ80镁合金显微组织和力学性能的影响。目前的研究探索了GNPs在改善PMgMCs力学性能方面的潜力和机理，并具有微观结构的见解。因此，通过流延铸造然后热挤出来制造由低含量的GNP（0.1和0.6wt％）增强的AZ80。在AZ80 / 0中可以同时提高拉伸性能，增强强度和断裂应变效率。1GNPs通过成本效益和简单的制造方法适应性来合成，从而使GNPs分布相当均匀。添加0.1 wt％的GNP会导致晶粒细化（〜10％），动态重结晶，更强的基础组织（〜750％），更多的β-共晶相溶解（〜66％），从而导致更多的动态沉淀（〜70％） ），并降低了产量不对称（〜23％）。与AZ80合金相比，AZ80 / 0.1GNPs复合材料的拉伸和压缩屈服强度分别提高了40％和15％。在拉伸和压缩睾丸中，有效的载荷传递是最重要的加强机制。同样，AZ80 / 0.1GNPs纳米复合材料的拉伸和压缩破坏应变分别提高了50％和37％。GNP的均匀分散，非基础滑移的增加，晶粒细化，