Effect of graphene oxide and reduced graphene oxide nanosheets on the microstructure and mechanical properties of mild steel jointing by flux-cored arc welding

Effects of graphene oxide addition in properties of shielded metal arc weld joints

“…Other works shown that the effect of graphene-related materials in welded joint properties is proportional to the graphene content added. Higher contents of graphene materials promote increment in microhardness, tensile properties (except ductility), and microstructural re nement [17,33,44]. By considering the tensile properties results and the in uence of graphene content in mechanical properties, there is a possibility that graphene-materials addition in some content would promote mechanical properties that satisfy E70XX electrode requirements using a stick composition closer to E6013 llers.…”

“…The results of the mentioned work suggested that graphene application through ller metal is more effective than prior deposition in prepared joints and indicated that graphene addition promoted an enormous improvement in joint tensile mechanical properties [17]. The other work treating arc welding of carbon steels was presented by Khosravi et al [34], where ux-cored arc welding (FCAW) was used to weld with GO and rGO prior to being deposited in joint bevels. The authors indicated that the GO addition promoted greater microstructure re nement and higher improvement of tensile yield strength than rGO [34].…”

“…The other work treating arc welding of carbon steels was presented by Khosravi et al [34], where ux-cored arc welding (FCAW) was used to weld with GO and rGO prior to being deposited in joint bevels. The authors indicated that the GO addition promoted greater microstructure re nement and higher improvement of tensile yield strength than rGO [34]. A standard limitation in the experimental methods of Jafarlou et al [17] and Khosravi et al [34] is that in both works, the authors performed tensile tests transversally on welded joints, in a way that tensile properties of the welded joint (base metal-weldment-base metal) were measured instead of WM properties [46].…”

“…The coating components also produce the welding slag, which performs pyrochemical reactions in molten metal, protects the WM from environmental oxidation during its cooling, and control cooling rates [48]. Once Jafarlou et al [17] indicated that graphene addition in SMAW electrodes could enhance WM properties, Khosravi et al [34] indicated that GO could promote better properties than rGO, and GO being an oxide, could have a higher potential to contribute to welding arc by charge carriers granting, GO would have potential to be an interesting compound added in SMAW sticks with intent to produce WM with boosted properties. SMAW-covered electrodes for mild steel, described in AWS A5.1, are classi ed as cellulosic, rutile, and low hydrogen or basic.…”

Prediction of weld bead geometry of AA5083 using taguchi technique: in the presence of siliconized zn-graphene oxide complex nanoparticles

“…Also, in another study, Fatahi et al investigated the effect of graphene/aluminum composite nanoparticles in welding Al6061 sheets [19]. In 2020, Khosravi et al investigated the effect of graphene oxide and reduced graphene oxide nanosheets on the microstructure and mechanical properties of weld metal [20]. In 2016, in welding Al6061 by friction stir process, Moriya et al investigated the mechanical properties of the weld metal by adding Graphite, Graphene, and Carbon nanotubes to the weld metal [21].…”