Distribution of macroscopic and intergranular residual stresses in Wire Arc Additively Manufactured structures

Wire Arc Additive Manufacturing (WAAM) is a promising additive manufacturing technique that allows for structures to be built with a high degree of freedom of design and repair large components. Residual stress induced by high temperature gradients are one of the main limiting factors affecting mechanical performance of WAAM parts. An analysis of the residual stress distribution within WAAM Ti-6Al-4V parts using synchrotron energy dispersive diffraction will allow to calibrate simulation tools and to optimize the process. The proposed study aims to characterize the macroscopic residual stress and intergranular stress distribution in WAAM parts produced with different interlayer times; and to determine the variation of residual stress at the interface between WAAM part and substrate, and at internal WAAM interfaces within the individual layers.