This work aims at evaluating the dimensional precision and the accuracy achievable through the Metal Binder Jetting Additive Manufacturing process. An artifact was designed, and 36 replicates were produced using a 17-4PH stainless steel powder aiming at evaluating different feature sizes. The dimensions of the samples were measured by a coordinate measuring machine (CMM) before and after sintering. At green state, the distribution of measured dimensions parallel to the building direction was centered on the nominal dimension, while the distribution of measured dimensions parallel to the building plane was shifted from the nominal ones. Dimensions of cavities were found to be significantly smaller than nominal ones (Z position for fundamental deviation), whereas the dimensions of outer features were larger than the nominal sizes probably on the reason of excessive binder saturation. The dimensional precision ranged from IT9 to IT11. After sintering, the inaccuracy increased with the distance of samples from the building plane, in turn related to non-uniform shrinkage on sintering. Additionally, sintering determined worsening in the dimensional precision, which ranged from IT11 to IT15.

Assessment of the Achievable Dimensional Tolerances in 17-4PH Stainless Steel Parts Fabricated by Metal Binder Jetting / Zago, Marco; Cristofolini, Ilaria. - (2024), pp. 31-40. (Intervento presentato al convegno ADM 2023 tenutosi a Firenze nel 6th-8th September 2023) [10.1007/978-3-031-52075-4_4].

Assessment of the Achievable Dimensional Tolerances in 17-4PH Stainless Steel Parts Fabricated by Metal Binder Jetting

Zago, Marco
Primo
;
Cristofolini, Ilaria
Ultimo
2024-01-01

Abstract

This work aims at evaluating the dimensional precision and the accuracy achievable through the Metal Binder Jetting Additive Manufacturing process. An artifact was designed, and 36 replicates were produced using a 17-4PH stainless steel powder aiming at evaluating different feature sizes. The dimensions of the samples were measured by a coordinate measuring machine (CMM) before and after sintering. At green state, the distribution of measured dimensions parallel to the building direction was centered on the nominal dimension, while the distribution of measured dimensions parallel to the building plane was shifted from the nominal ones. Dimensions of cavities were found to be significantly smaller than nominal ones (Z position for fundamental deviation), whereas the dimensions of outer features were larger than the nominal sizes probably on the reason of excessive binder saturation. The dimensional precision ranged from IT9 to IT11. After sintering, the inaccuracy increased with the distance of samples from the building plane, in turn related to non-uniform shrinkage on sintering. Additionally, sintering determined worsening in the dimensional precision, which ranged from IT11 to IT15.
2024
Proceedings of the Third International Conference on Design Tools and Methods in Industrial Engineering, vol. 1
Cham, CH
Springer Science and Business Media Deutschland GmbH
978-3-031-52074-7
978-3-031-52075-4
Zago, Marco; Cristofolini, Ilaria
Assessment of the Achievable Dimensional Tolerances in 17-4PH Stainless Steel Parts Fabricated by Metal Binder Jetting / Zago, Marco; Cristofolini, Ilaria. - (2024), pp. 31-40. (Intervento presentato al convegno ADM 2023 tenutosi a Firenze nel 6th-8th September 2023) [10.1007/978-3-031-52075-4_4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/403911
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