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

作　　者：Mohammad Khosravi Mohammad Mansouri Ali Gholami Yadollah Yaghoubinezhad 

机构地区：[1]Department of Mechanical Engineering,Birjand University of Technology Birjand,P.O.Box 97175-569235,Iran [2]Department of Materials Engineering,Birjand University of Technology Birjand,P.O.Box 97175-569315,Iran

出　　处：《International Journal of Minerals,Metallurgy and Materials》2020年第4期505-514,共10页矿物冶金与材料学报（英文版）

基　　金：the Sustainable Nano Surfaces of the East(Payanano.com)Company in Islamic Republic of Iran.

摘　　要：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.

关 键 词：GRAPHENE OXIDE reduced GRAPHENE OXIDE FLUX-CORED arc welding steel mechanical properties 

分 类 号：TG444[金属学及工艺—焊接]