Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/154712
Title: | Surface finishing of additively manufactured Inconel 625 complex internal channels : a case study using a multi-jet hydrodynamic approach | Authors: | Nagalingam, Arun Prasanth Yeo, Swee Hock |
Keywords: | Engineering::Mechanical engineering | Issue Date: | 2020 | Source: | Nagalingam, A. P. & Yeo, S. H. (2020). Surface finishing of additively manufactured Inconel 625 complex internal channels : a case study using a multi-jet hydrodynamic approach. Additive Manufacturing, 36, 101428-. https://dx.doi.org/10.1016/j.addma.2020.101428 | Journal: | Additive Manufacturing | Abstract: | The surface roughness of components built using the laser powder bed fusion (L-PBF) process is poor. Surface finishing the internal channels of L-PBF components is a challenge. We propose a multi-jet hydrodynamic approach to enhance the surface finish quality of the internal channels. We investigate the hydrodynamic finishing on L-PBF Inconel 625 linear, stepped, and non-linear internal channels with diameters 5 to 1 mm and length up to 100 mm (replicating the geometries in rocket injectors, fuel nozzles, and cooling channels). The multi-jet hydrodynamic finishing approach improved the surface quality by 60–90 % (final Ra, Sa ≤ 1 μm and Rz, Sz ≤ 20 μm), using an abrasive concentration of ≤1 % in 15 min. of processing time. Areal surface texture parameters Sdr and roughness ratio r ≈1, evidenced the uniformity of the surface finish with dominant abrasive microcuts, regardless of the initial non-uniform additive manufactured surface. Most of the surface finished channels had excellent dimensional integrity and internal contour circularity. We then discussed the advancements required in metal additive manufacturing and internal surface finishing—to safely deploy L-PBF components with micro internal channels in fuel injection and fluid transfer applications. | URI: | https://hdl.handle.net/10356/154712 | ISSN: | 2214-7810 | DOI: | 10.1016/j.addma.2020.101428 | Schools: | School of Mechanical and Aerospace Engineering | Research Centres: | Rolls-Royce@NTU Corporate Lab | Rights: | © 2020 Elsevier B.V. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MAE Journal Articles |
SCOPUSTM
Citations
10
36
Updated on Mar 21, 2024
Web of ScienceTM
Citations
10
24
Updated on Oct 28, 2023
Page view(s)
135
Updated on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.