Abstract Scope |
Laser powder bed fusion (LPBF) enables the fabrication of dense, high-strength, and complex components, but their structural integrity may degrade in aggressive environments. This study presents the structural integrity of additively manufactured 18Ni-300 steel by exposing it to aggressive environments following the ASTM B117 standard under a constant temperature of 35 °C ± 2 °C and humidity of 95% ± 5%. To assess the impact of harsh environments on structural integrity, static and multiaxial fatigue analyses were performed, alongside X-ray computed tomography, fractography, and surface roughness measurements to investigate degradation mechanisms. Experimental results indicate that samples exposed to corrosive environments exhibit reduced multiaxial fatigue performance, increased weight loss, and surface defects, with degradation intensified by prolonged exposure. ANOVA analysis confirms that exposure duration significantly impacts the structural integrity of LPBFed parts, more so than corrosion medium concentration (wt.%). These results support applications demanding corrosion-resistant structural stability. |