Investigation on microstructure and mechanical properties on pulsed current gas tungsten arc welded super alloy 617

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Mageshkumar, K.^1,2 ; Kuppan, P.^2 ; Arivazhagan, N.^2

Ganadipathy Tulsis Jain Engineering College, Vellore, Tamil Nadu

632102, India^1

School of Mechanical Engineering, VIT University, Vellore, Tamil Nadu

632014, India^2

关键词: Continuous current modes;    Gas tungsten arc;    Grain boundary regions;    Metallurgical and mechanical properties;    Microstructure and mechanical properties;    Pulsed current gas tungsten arc welding;    Pulsed currents;    Secondary phasis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/6/062032/pdf
DOI  :  10.1088/1757-899X/263/6/062032

来源: IOP

【 摘 要 】

The present research work investigates the metallurgical and mechanical properties of weld joint fabricated by alloy 617 by pulsed current gas tungsten arc welding (PCGTAW) technique. Welding was done by ERNiCrCoMo-1 filler wire. Optical and Scanning Electron Microscope (SEM) revealed the fine equiaxed dendritic in the fusion zone. Electron Dispersive Spectroscopy (EDS) demonstrates the presence of Mo-rich secondary phases in the grain boundary regions. Tensile test shows improved mechanical properties compared to the continuous current mode. Bend test didn't indicate the presence of defects in the weldments.