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Article
Publication date: 4 June 2024

Ludovico Martignoni, Andrea Vegro, Sara Candidori, Mohammad Qasim Shaikh, Sundar V. Atre, Serena Graziosi and Riccardo Casati

This study aims to deepen the knowledge concerning the metal fused filament fabrication technology through an analysis of the printing parameters of a commercial 316L stainless…

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Abstract

Purpose

This study aims to deepen the knowledge concerning the metal fused filament fabrication technology through an analysis of the printing parameters of a commercial 316L stainless steel filament and their influence on the porosity and mechanical properties of the printed parts. It also investigates the feasibility of manufacturing complex geometries, including strut-and-node and triply periodic minimal surface lattices.

Design/methodology/approach

A three-step experimental campaign was carried out. Firstly, the printing parameters were evaluated by analysing the green parts: porosity and density measurements were used to define the best printing profile. Then, the microstructure and porosity of the sintered parts were investigated using light optical and scanning electron microscopy, while their mechanical properties were obtained through tensile tests. Finally, manufacturability limits were explored with reference samples and cellular structures having different topologies.

Findings

The choice of printing parameters drastically influences the porosity of green parts. A printing profile which enables reaching a relative density above 99% has been identified. However, voids characterise the sintered components in parallel planes at the interfaces between layers, which inevitably affect their mechanical properties. Lattice structures and complex geometries can be effectively printed, debinded, and sintered if properly dimensioned to fulfil printing constraints.

Originality/value

This study provides an extensive analysis of the printing parameters for the 316L filament used and an in-depth investigation of the potential of the metal fused filament fabrication technology in printing lightweight structures.

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Book part
Publication date: 9 March 2022

Piero Formica

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Ideators
Type: Book
ISBN: 978-1-80262-830-2

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Book part
Publication date: 12 November 2018

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Gender and the Media: Women’s Places
Type: Book
ISBN: 978-1-78754-329-4

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Book part
Publication date: 16 June 2023

Leda Balbino

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Digital Memory in Brazil
Type: Book
ISBN: 978-1-80262-803-6

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Book part
Publication date: 14 October 2022

Petra Nordqvist and Leah Gilman

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Donors
Type: Book
ISBN: 978-1-80043-564-3

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