De-risk assessment: Phase and strain monitoring during direct metal deposition of Ni-superalloy by in-situ neutron and synchrotron diffraction (PhaNi-Neutron)

Key Objectives: 1. Phase Precipitation Analysis: Investigating phase kinetics during DED to better understand the relationships with process parameters, temperature distribution and microstructure. 2. Strain Build-up Monitoring: Utilizing neutron diffraction to characterize dynamic stress and strain evolution during the DED process. 3. Traditional Laboratory Characterization: Correlating microstructural details with in-situ and ex-situ measurements to enhance understanding of material properties.

The PhaNi-Neutron project, conducted by the Fraunhofer Institute for Material and Beam Technology IWS,focused on the phase and strain monitoring during the laser based direct energy deposition (DED-LB/M) ofNi-superalloys using in-situ neutron and synchrotron diffraction techniques. The project aimed to enhancethe understanding of the solidification processes and phase evolution in additive manufacturing, specifically for the nickel superalloys IN718 and IN625.