Material extrusion of metals: Enabling multi-material alloys in additive manufacturing

This article discusses the use of Material Extrusion of Metals (MEX/M - defined in ISO/ASTM 52900) technology for producing multi-material components, which offers a cost-effective and efficient method without requiring major adaptations to existing equipment. The article presents the successful manufacture of 316L/17–4PH multi-alloy steel cubes for four different sintering temperatures using commercially available equipment and feedstock. The feasibility study of the multi-material samples was supported by analyzing the shrinkage, optical density, and microstructure as output parameters. Unlike other works, the multi-material produced parts showed regular shrinkage behaviour and no major deformation, indicating the possibility of creating functional parts without the need for post-processing. Interestingly, relevant findings were made on the different shrinkage values obtained for the constellations considered. Further in-depth investigation of each parameter involved in all the stages of the chain value (extrusion, debinding, and sintering) will be key to support the present results. Additional research into the mechanical and magnetic properties of the samples produced could lead this combination of materials to applications in various industries including automotive and aerospace.

Subjects

17–4PH

316 L

Additive Manufacturing

Filament Feedstock

MEX/M Technology

Multi-Material Alloys

Sintering

DDC Class

620: Engineering

Funding(s)

RMIT European Doctoral Innovators Programme

Projekt DEAL

Publication version

publishedVersion

Lizenz

https://creativecommons.org/licenses/by/4.0/

Name

1-s2.0-S2352492823025801-main.pdf

Type

Main Article

Size

6.45 MB

Format

Adobe PDF

Options

Material extrusion of metals: Enabling multi-material alloys in additive manufacturing