Surface finishing of additively manufactured IN718 lattices by electrochemical machining

Lynch, Matthew L.; Williams, Kerisha; Cabrera, Mariana; Beccuti, Tommaso

doi:10.1007/s00170-020-05699-8

Cited by 12 publications

(10 citation statements)

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“…Sum of the maximum peak height value and the maximum valley height value (average of 5l) [35,37,[40][41][42][43][44]50]…”

Section: R Zmentioning

confidence: 99%

“…Figure 6b presents the frequency of each parameter utilized for the quantitative assessment of surface texture. The R a surface roughness has been documented in 29% of the reviewed literature, [17,21,[35][36][37][38][39][40][41][42][43][44][45] while the S a parameter is used in 21%, [13,19,20,40,41,[46][47][48][49] and R z is used in 11% [35,37,[40][41][42][43][44]50] of the reviewed literature studies. The rest of reported studies (39%) have deployed other parameters for surface texture evaluation, which is further detailed in Figure 6b.…”

Section: S Kumentioning

confidence: 99%

“…The thickness reduction associated with the roughness improvement for all geometries is reported in Table 3. [13] Lynch et al [50] have used the same idea of an inserted CE for ECP of lattices made of Inconel 718. The lattices and CE were printed by the LB-PBF method with similar materials.…”

Section: Ecp Of Internal Surfaces Using Inserted Cathodementioning

confidence: 99%

“…This improvement was achieved through material dissolution, which decreased the strut thickness by 3.4% (i.e., down to 60 μm). [50] Generally, this type of cathode electrode insertion is highly geometry dependent, and for each workpiece, an individual cathode electrode should be printed. Hence, this approach adds significantly to the part's manufacturing cost and material (feedstock) consumption, thus increasing the production method's carbon footprint.…”

Section: Ecp Of Internal Surfaces Using Inserted Cathodementioning

confidence: 99%

“…3D-printed electrodes can be placed according to the requirements at any point, even local polishing can be accomplished. Two typical pipe structures were selected for [50] Copyright 2021, Springer. b) Cathode electrodes fabricated by 3D-printing for ECP of pipe's internal surface with constant-diameter and variable-diameter; c) Internal surface improvement of the curved pipe after a combination of OECP and ECP.…”

Section: Ecp Of Internal Surfaces Using Inserted Cathodementioning

confidence: 99%

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On the Post‐Processing of Complex Additive Manufactured Metallic Parts: A Review

Pourrahimi,

Hof

2024

Adv Eng Mater

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Additive manufacturing (AM) is gaining more attention due to its capability to produce customized and complex geometries. However, one significant drawback of AM is the rough surface finish of the as‐built parts, necessitating post‐processing for achieving the desired surface quality that meets application requirements. Post‐processing of complex geometries, such as parts with internal holes, lattice structures, and free‐form surfaces, poses unique challenges compared to other components. This review classifies various post‐processing methods employed for complex AM parts, presenting the experimental conditions for each treatment alongside the resulting improvement in surface roughness as a success criterion. The post‐processing methods are categorized into four groups: electrochemical polishing (ECP), chemical polishing (CP), mechanical polishing, and hybrid methods. Notably, mechanical methods exhibit the highest roughness improvement at 69.9%, followed by ECP (59.9%), hybrid methods (47.4%), and CP (49.5%). Nevertheless, mechanical post‐processing techniques are less frequently utilized for lattice parts, making chemical or electrochemical methods more promising alternatives. In summary, all four categories of post‐processing methods can improve the internal surfaces quality of AM holes. While mechanical methods offer the most substantial roughness improvement overall, chemical and electrochemical methods show particular potential for addressing the challenges associated with complex geometries.This article is protected by copyright. All rights reserved.

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“…Sum of the maximum peak height value and the maximum valley height value (average of 5l) [35,37,[40][41][42][43][44]50]…”

Section: R Zmentioning

confidence: 99%