PSI - Issue 47

P. Ferro et al. / Procedia Structural Integrity 47 (2023) 535–544 P. Ferro et al. / Structural Integrity Procedia 00 (2023) 000–000

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Fig. 10. SEM micrographs of partially sintered HCS powder in touch with IN718 particles

Fig. 11. EDS line scan across HCS and IN718 partially sintered granules

As expected, it is shown a gradually increase of Ni and Cr moving from the interface toward the HCS granule core.

4. Conclusions A first attempt to produce Inconel 718-High Carbon Steel bi-metallic parts via FDMS was described. The main results can be summarized as follows:  IN718 showed a quite good sintering grade, while HCS sintered only partially, resulting in a high amount of porosity inside the FDMS parts;  a consistent volume shrinkage and sample distortion was induced by the debinding and sintering heat treatment;  different secondary phases (i.e.: Leaves phases) were detected in sintered IN718 powder;