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

Ahmed Obeidi, Muhannad and Uí Mhurchadha, Sinéad M. and Raghavendra, Ramesh and Conway, Alex and Souto, Carlos and Tormey, David and Ahad, Inam Ul and Brabazon, Dermot (2021) Comparison of the porosity and mechanical performance of 316L stainless steel manufactured on different laser powder bed fusion metal additive manufacturing machines. Journal of Materials Research and Technology, 13. pp. 2361-2374. ISSN 2238-7854

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Abstract

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

Item Type: Article
Additional Information: Funding Information: This publication has emanated from research supported by a research grant from Science Foundation Ireland (SFI) under grant number 16/RC/3872 and is co-funded under the European Regional Development Fund. Samples used this project were manufactured using facilities in the Additive Research Laboratory at Trinity College Dublin, Ireland. The AR-Lab is an SFI supported research centre; SEAM, Waterford Institute of Technology; APT, Dublin City university; and at Institute of Technology Sligo. Funding Information: This publication has emanated from research supported by a research grant from Science Foundation Ireland (SFI) under grant number 16/RC/3872 and is co-funded under the European Regional Development Fund . Publisher Copyright: © 2021 The Author(s)
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2500/2503
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Depositing User: Admin SSL
Date Deposited: 19 Oct 2022 23:09
Last Modified: 11 Aug 2023 08:00
URI: http://repository-testing.wit.ie/id/eprint/4385

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