Online monitoring systems calbrated and tested

CHALM will adopt five on-line process monitoring systems, allowing to perform on-line monitoring of number of key aspect during the whole build process: • continuous monitoring of the key process properties as laser power and scanner, temperature (build platform and process chamber), cooling systems, electronic, gas circulation systems, etc.; • powder bed monitoring – monitoring of the powder recoating with the integrated camera; • process atmosphere control based on continuous analysis of the oxygen concentration close to the powder bed with sensitivity around 10 ppm and automatic initiation of the additional purging with the process gas to assure process gas purity; • monitoring of the energy application in the melt pool– also called optical tomography –based on utilization of the sCMOS camera that allows to detect overall fusion and cooling behaviour • real-time melt pool monitoring, based on measurement of the light emissions from the melt pool. Possibility to display data in 2D and 3D makes it possible to detect any abnormalities and hence draw conclusion regarding the quality of the final component. Systems will need to be developed for the specific materials and in some cases design of interest and will be validated utilizing extensive materials characterisation.