The low productivity of the SLM process is known to be a limiting factor, but speeding up the process can lead to material defects. Two sets of SLM process parameters enhancing its productivity by 50 % were devised and tested in comparison with baseline sets, in terms of material microstructure, porosity, surface roughness, static mechanical properties, and HCF behavior, in the as-built and aged conditions. The as-built surface was investigated. Despite a significant increase in the porosity and surface roughness, the fatigue strength was reduced by 5 %. The Murakami areaR parameter effectively correlates the fatigue strength and surface roughness variations.

Productivity-oriented SLM process parameters effect on the fatigue strength of Inconel 718 / Macoretta, G.; Bertini, L.; Monelli, B. D.; Berto, Filippo. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 168:(2023). [10.1016/j.ijfatigue.2022.107384]

Productivity-oriented SLM process parameters effect on the fatigue strength of Inconel 718

Berto Filippo
Conceptualization
2023

Abstract

The low productivity of the SLM process is known to be a limiting factor, but speeding up the process can lead to material defects. Two sets of SLM process parameters enhancing its productivity by 50 % were devised and tested in comparison with baseline sets, in terms of material microstructure, porosity, surface roughness, static mechanical properties, and HCF behavior, in the as-built and aged conditions. The as-built surface was investigated. Despite a significant increase in the porosity and surface roughness, the fatigue strength was reduced by 5 %. The Murakami areaR parameter effectively correlates the fatigue strength and surface roughness variations.
2023
defects; high cycle fatigue; S-N curves; selective laser melting; surface roughness
01 Pubblicazione su rivista::01a Articolo in rivista
Productivity-oriented SLM process parameters effect on the fatigue strength of Inconel 718 / Macoretta, G.; Bertini, L.; Monelli, B. D.; Berto, Filippo. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 168:(2023). [10.1016/j.ijfatigue.2022.107384]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1668649
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