Investigation on Microstructure and Mechanical Properties of Continuous and Pulsed Current Gas Tungsten Arc Welded alloy 600

International Conference on Advances in Materials and Manufacturing Applications 2017

Srikanth, A.^1 ; Manikandan, M.^1

School of Mechanical Engineering, VIT University, Vellore, India^1

关键词: Alloy 600;    Continuous current modes;    Energy dispersive spectroscopies (EDS);    Micro-segregation;    Microstructural changes;    Microstructure and mechanical properties;    Pulsed current gas tungsten arc welding;    Refined microstructure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012073/pdf
DOI  :  10.1088/1757-899X/310/1/012073

来源: IOP

【 摘 要 】

The present study investigates the microstructure and mechanical properties of joints fabricated by Continuous and pulsed current gas tungsten arc welded alloy 600. Welding was done by autogenous mode. The macro examination was carried out to evaluate the welding defects in the weld joints. Optical and Scanning Electron Microscope (SEM) were performed to assess the microstructural changes in the fusion zone. Energy Dispersive Spectroscopy (EDS) analysis was carried to evaluate the microsegregation of alloying elements in the fusion zone. The tensile test was conducted to assess the strength of the weld joints. The results show that no welding defects were observed in the fusion zones of Continuous and Pulsed current Gas Tungsten Arc Welding. The refined microstructure was found in the pulsed current compared to continuous current mode. Microsegregation was not noticed in the weld grain boundary of continuous and pulsed current mode. The pulsed current shows improved mechanical properties compared to the continuous current mode.