Fatigue response of AlSi10Mg by laser powder bed fusion: influence of build orientation, heat, and surface treatments

• Published in: Progress in additive manufacturing
• Main Authors: Fini, S., Croccolo, D., De Agostinis, M., Olmi, G., Paiardini, L., Scapecchi, C., Mele, M.
• Format: Journal Article
• Language: English
• Published: 02.07.2024
• ISSN: 2363-9512; 2363-9520
• DOI: 10.1007/s40964-024-00712-y

Abstract The aim of this study is to analyze how the fatigue behavior of AlSi10Mg by laser powder bed fusion is affected by build orientation, heat, and surface treatments. A three-by-three factorial plan has been arranged for this purpose. Particularly, regarding the heat treatment, three levels were considered (as built, age hardening, and stress relief); whereas, for the surface treatment, three levels were investigated (micro-shot-peening, micro-shot-peening plus fine blasting, and machining and lapping following laser powder bed fusion). Regarding the build orientation, the specimens were manufactured using three different build orientations (0°, 45°, and 90°). The obtained data have been statistically analyzed by a three-factor ANOVA-based method. The results, supported by fractographic and micrographic microscopy analyses, indicate that the age-hardening treatment yields the maximum benefits, whereas stress relief may even have a detrimental effect. As for surface treatments, a positive influence of shot-peening has been found.