Metal Additive Manufacturing Conference - MAMC 2022

In this work, the influence of the as-built microstructure of a Hastelloy X with modified chemistry, processed by power bed fusion-laser beam (PBF-LB), on the stress-rupture properties (816°C, 103 MPa) is studied. Further, the significant effect and underlying mechanisms of the minor and ppm alloying additions on the improvement of the high temperature creep strength of the material is discussed. HX with tailored chemistry, shows significantly low solidification cracking susceptibility during the PBF-LB, while minor alloying additions improve the time to rupture significantly (i.e., by up to 2.5 times).