| Abstract Scope |
Ni Hastelloy X (Ni with Fe, Cr, and Mo) is a novel and important metallic system for aerospace, energy, engine applications, etc., and the combination with selective laser melting (SLM) technique greatly expands its geometry complexity and design flexibility. However, how SLM alters its microstructures and influences its properties, especially its performance under high temperature and corrosive environments, is largely unknown. This presentation will show our efforts to optimize processing parameters to achieve dense Ni Hastelloy X printing and investigate the SLM-induced microstructure changes in detail. With this understanding, the mechanical properties under high temperature (i.e., 850oC) and the anti-corrosion performance in corrosive media (i.e., 10 wt.% NaNO3) are systematically analyzed, and their detailed relationship with the SLM-tuned microstructures have been revealed. This fundamental study with strong application scenarios under high temperatures and corrosive environments is critical for the sustainable application and stable service of SLM-processed Ni Hastelloy X. |