The effect of graphene oxide (GO) and reduced graphene oxide (RGO) nanosheets on the microstructure and mechanical properties of welded joints of mild steel was evaluated by flux-cored arc welding. GO was synthesized by the Hummer's method and was reduced under hydrothermal conditions at a pressure of 1.1 MPa at 180°C for 12 h. 1, 3, and 10 mg/mL paste fillers were used in GO and RGO, and applied to the weld notch. The results clearly showed that by increasing the concentration of RGO up to 10 mg/mL, the tensile strength and hardness of the weld metal were improved by approximately 20.5% and 38.4%, respectively, because the coarse grains were changed into fine domains. The domain of the nanosheets cluster was 19.85 × 10⁻⁹ m. Specifically, the RGO nanosheets contributed to modifying the mechanical properties of the welded steel, likely due to dislocation pinning.

通过药芯焊丝电弧焊研究了氧化石墨烯（GO）和还原氧化石墨烯（RGO）纳米片对低碳钢焊接接头的组织和力学性能的影响。GO通过Hummer方法合成，并在水热条件下于180℃在1.1MPa的压力下还原12小时。在GO和RGO中使用了1、3和10 mg / mL的糊状填充剂，并将其应用于焊缝。结果清楚地表明，通过将RGO的浓度提高到10 mg / mL，焊接金属的抗拉强度和硬度分别提高了大约20.5％和38.4％，这是因为将粗晶粒变成了细小区域。纳米片簇的域为19.85×10 ^-9米 具体来说，RGO纳米片可能是由于位错钉扎而改变了焊接钢的机械性能。