Is the energy density a reliable parameter for materials synthesis by selective laser melting?

By Kondagokuldoss Prashanth, S. Scudino, T. Maity, J. Das, J. Eckert. 2017

376 citations recorded by the source corpus.

ABSTRACT The effective fabrication of materials using selective laser melting depends on the process parameters. Here, we analyse the suitability of the energy density to represent the energy transferred to the powder bed, which is effectively used to melt the particles and to produce the bulk specimens. By properly varying laser power and speed in order to process the powder at constant energy density, we show that the equation currently used to calculate the energy density gives only an approximate estimation and that hatch parameters and material properties should be considered to correctly evaluate the energy density. GRAPHICAL ABSTRACT IMPACT STATEMENT Al-12Si SLM samples were fabricated at constant energy density. The laser power and laser scan speed combination variation was used to demonstrate the significant changes needed with energy density equation.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/7d701e38dbb664b13d1f38c3b8fcf856e6510d25

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. A. Fatemi
2. Ian Ashcroft
3. N. Sanaei
4. Christopher John Tuck
5. L. Parry
6. N. Aboulkhair
7. Nima Shamsaei
8. Richard J. M. Hague

In Mechanical Engineering

1. Ian Ashcroft
2. Christopher John Tuck
3. A. Fatemi
4. L. Parry
5. N. Aboulkhair
6. N. Sanaei
7. Nima Shamsaei
8. N. Phan

Citations in the corpus

• 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “[45] who provided experimental evidence for the lack of reliability of using the energy density as a design parameter in SLM by fabricating samples using a range of various laser powers and scan speeds, maintaining the same energy density, showing the different levels of density and mechanical prope”
• Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects (2020, background): “…absorption coefficient ( g ), deposited thickness ( t ), hatch spacing ( h ), and scan speed ( V ), as seen in the following relationship [37,48,77,82]: For powder fed and wire fed processes, the layer thickness and hatch spacing are coupled with the stock feed rate (volumetric, f ) and are not…”