The present study investigates microstructure, mechanical characteristics, and residual stresses of alloy C-276 thick wallcomponent manufactured by wire arc additive manufacturing technique. The microstructure of the fabricated thick wall parthas been analysed in various regions. The microstructure at the top, intermediate, and bottom regions result in equiaxed,cellular, and columnar dendrites. Microsegregation was evaluated in the interdendritic regions of the top, intermediate,and bottom surfaces and in travel and build directions. Further in electron backscatter diffraction investigates the textureand microstructure of materials by utilising the inverse pole figure and grain boundary maps in travel and build directions. Also, as compared to low angle grain boundaries, the fraction of high angle grain boundaries is higher in build directionthan travel direction. Further, residual stress analysis exhibits the tensile residual stress in the travel direction compared tobuild direction and compressive stresses were induced in the top region of the deposited part in the build direction. Also,no substantial deviations of microhardness values were in multiple as-deposited regions. Typically, the tensile properties ofthe material vary significantly across various direction such as horizontal, vertical and inclined. The higher tensile strengthobserved in the horizontal direction (745 ± 6.2 MPa) compared to vertical and inclined directions. This study provides betterinsights into the additively manufactured nickel-based superalloy's microstructure, residual stress and mechanical properties.
The present study investigates microstructure, mechanical characteristics, and residual stresses of alloy C-276 thick wallcomponent manufactured by wire arc additive manufacturing technique. The microstructure of the fabricated thick wall parthas been analysed in various regions. The microstructure at the top, intermediate, and bottom regions result in equiaxed,cellular, and columnar dendrites. Microsegregation was evaluated in the interdendritic regions of the top, intermediate,and bottom surfaces and in travel and build directions. Further in electron backscatter diffraction investigates the textureand microstructure of materials by utilising the inverse pole figure and grain boundary maps in travel and build directions. Also, as compared to low angle grain boundaries, the fraction of high angle grain boundaries is higher in build directionthan travel direction. Further, residual stress analysis exhibits the tensile residual stress in the travel direction compared tobuild direction and compressive stresses were induced in the top region of the deposited part in the build direction. Also,no substantial deviations of microhardness values were in multiple as-deposited regions. Typically, the tensile properties ofthe material vary significantly across various direction such as horizontal, vertical and inclined. The higher tensile strengthobserved in the horizontal direction (745 ± 6.2 MPa) compared to vertical and inclined directions. This study provides betterinsights into the additively manufactured nickel-based superalloy's microstructure, residual stress and mechanical properties.