Metallurgical Characterization of 4 MM wide Narrow Groove Fabricated by Standard GMAW Versus CW-GMAW Processes

  • Program
  • Room 2E East
  • September 13 2018
  • 11:15 am - 11:40 am

The mechanical properties of structural welds depend on the microstructures which result from a combination of both welding method and groove design. Consequently, establishing relationships between processing and microstructures is fundamental to correlating the performance of joints in service to their properties. This work provides a metallurgical analysis of 4mm-wide narrow square groove welds fabricated using the standard gas metal arc welding (GMAW) and cold wire gas metal arc welding (CW-GMAW). Vickers hardness of the weld metal, heat affected zone (HAZ) in different locations and metallographic features of both joints are compared. The findings suggest that CW-GMAW can maintain lower values of PAGS compared to the standard GMAW specimens, and this can help to maintain the properties in the HAZ