Powder Bed Fusion-Laser Beam (PBF-LB/M) enables the production of Functionally Graded Materials (FGMs) with tailored properties for specific applications. This study explores a novel method for creating FGMs within layers using a custom powder separation system that integrates seamlessly with existing PBF-LB plants employing blade/roller spreading. Two distinct approaches were implemented: the ex-situ method, where powders were pre-mixed before deposition in transition zones; and the other, which employed an innovative setup for in-situ real-time powder mixing during deposition. AISI 316L stainless steel and CoCrMo alloy were chosen for their excellent mechanical properties, biocompatibility and corrosion resistance, making them optimal for aerospace and biomedical applications. Results from microstructural analysis, mechanical testing and chemical characterization confirm the reliability and cost-effectiveness of this approach, highlighting its potential to advance multi-material AM.
Novel Approaches for Layer-Level Functionally Graded Materials via PBF-LB/M / Errico, Vito; Posa, Paolo; Campanelli, Sabina Luisa - In: Selected Topics in Manufacturing, Emerging Trends from the Perspective of AITeM’s Young Researchers[s.l] : Springer Nature Switzerland, 2025. - pp. 105-122 [10.1007/978-3-031-99501-9_7]
Novel Approaches for Layer-Level Functionally Graded Materials via PBF-LB/M
Errico, Vito
;Posa, Paolo;Campanelli, Sabina Luisa
2025
Abstract
Powder Bed Fusion-Laser Beam (PBF-LB/M) enables the production of Functionally Graded Materials (FGMs) with tailored properties for specific applications. This study explores a novel method for creating FGMs within layers using a custom powder separation system that integrates seamlessly with existing PBF-LB plants employing blade/roller spreading. Two distinct approaches were implemented: the ex-situ method, where powders were pre-mixed before deposition in transition zones; and the other, which employed an innovative setup for in-situ real-time powder mixing during deposition. AISI 316L stainless steel and CoCrMo alloy were chosen for their excellent mechanical properties, biocompatibility and corrosion resistance, making them optimal for aerospace and biomedical applications. Results from microstructural analysis, mechanical testing and chemical characterization confirm the reliability and cost-effectiveness of this approach, highlighting its potential to advance multi-material AM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
