An experiment-analytical procedure based on the building of an object in severe atmosphere resistant steel by SLM is proposed. The complex shape was investigated with the sectioning and laboratory observation of the physical object. The study evidenced the need to get a variable layer thickness to follow double curvature complex shapes. In particular the key variable in the process is the melt bath dimension by which the metal powder assumes by solidification the required global geometry. It was observed that the bath detected mainly in terms of the area of section tends to decrease when approaching to the surface of the physical model where the complex geometry needs to be described. Relationships describing the bath area behaviour and correlations between surface roughness and internal bath dimensions were found and proposed in detail. The surface roughness is highly correlated with the bath area in the zones of the section approaching the surface.
Characterization of surface and bulk features of SLM parts / Bruni, Carlo; Ciccarelli, Daniele; Mancia, Tommaso; Pieralisi, Massimiliano; Greco, Luciano. - ELETTRONICO. - 926:(2022), pp. 27-33. (Intervento presentato al convegno ESAFORM 2022 tenutosi a BRAGA, PORTOGALLO nel 27-29 APRILE) [10.4028/p-7d3yb1].
Characterization of surface and bulk features of SLM parts
Bruni, Carlo;Ciccarelli, Daniele;Mancia, Tommaso;Pieralisi, Massimiliano;Greco, Luciano
2022-01-01
Abstract
An experiment-analytical procedure based on the building of an object in severe atmosphere resistant steel by SLM is proposed. The complex shape was investigated with the sectioning and laboratory observation of the physical object. The study evidenced the need to get a variable layer thickness to follow double curvature complex shapes. In particular the key variable in the process is the melt bath dimension by which the metal powder assumes by solidification the required global geometry. It was observed that the bath detected mainly in terms of the area of section tends to decrease when approaching to the surface of the physical model where the complex geometry needs to be described. Relationships describing the bath area behaviour and correlations between surface roughness and internal bath dimensions were found and proposed in detail. The surface roughness is highly correlated with the bath area in the zones of the section approaching the surface.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
