Comparison of the porosity and mechanical performance of 316L stainless steel manufactured on different laser powder bed fusion metal additive manufacturing machines

• DOI: 10.1016/j.jmrt.2021.06.027
• Publication Date: 2021-06-15T23:06:54Z
• Authors: Muhannad Ahmed Ob...; Sinéad M. Uí Mhur...; Ramesh Raghavendra; Alex Conway; Carlos Souto; David Tormey; Inam Ul Ahad; Dermot Brabazon
• Keywords: Repeatability; Metal powder; Elongation; Selective Laser Melting; Universal testing machine

Despite the recent progress in additive manufacturing (AM) process and technology, challenges repeatability reproducibility of AM parts still hinders adoption this technique many industries. This is particularly difficult when a part qualified on particular certain machine using optimised parameters. If manufacturer wishes to expand production multiple machines, ability translate these parameters different machines much be understood. In study, four metal L-PBF printers were used produce 316L tensile testing samples same processing powder supplied from single batch supplier. addition analysis correlation between input output measures, study reports that despite set parameters, there significant variations found mechanical performance properties produced machines. For range resulting volumetric energy density applied 21–37 J/mm3, values (4–42)%, (200–716) MPa, (52–214) GPa obtained for elongation, ultimate strength elastic modulus additively manufactured respectively.