A review on the state-of-the-art of surface finishing processes and related ISO/ASTM standards for metal additive manufactured components

Lee, Jian‐Yuan; Nagalingam, Arun Prasanth; Yeo, Song Huat

doi:10.1080/17452759.2020.1830346

Cited by 116 publications

(69 citation statements)

References 143 publications

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“…In Figure 7, the 2D false color maps of the generated top surfaces of the sandwich part are displaced for the FFF and MJP process on the first and second row correspondingly. Moreover, the computed parameters for evaluating Another aspect for evaluating the performance and the integrity of a manufactured part is its surface finish, where according to Lee et al [40] surface quality could affect the mechanical behavior of a component. Surface finish is described as the characterization and the measurement of the surface topography, where the topography is mainly associated with the geometric data of the investigated surface [41].…”

Section: Dimensional and Surface Finish Inspectionmentioning

confidence: 99%

“…Figure 10 shows the experimental results concerning the bending strength and modulus, as well as the ultimate core's shear strength and the peak facing stresses in order to elucidate the behavior of the sandwich lattice structures. It is evident, that the surface roughness of a part is associated mainly with its fatigue endurance stress [40]. More specifically, the lower the quality in surface finish, the higher is the possibility for lower fatigue life and crack initiation.…”

Section: Three-point Bending Tests and Fe Analysesmentioning

confidence: 99%

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Experimental and Computational Investigation of Lattice Sandwich Structures Constructed by Additive Manufacturing Technologies

Kladovasilakis

Charalampous

Tsongas

et al. 2021

JMMP

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Additive Manufacturing (AM) technologies offer the ability to construct complex geometrical structures in short manufacturing lead time coupled with a relatively low production cost when compared to traditional manufacturing processes. The next trend in mechanical engineering design is the adaption of design strategies that build products with lightweight lattice geometries like sandwich structures. These structures possess low mass, large surface area to volume ratio, high porosity, and adequate mechanical behavior, which are properties of great importance in scientific fields such as bioengineering, automotive, and aerospace engineering. The present work is focused on producing sandwich structures with complex lattice patterns like the Triply Periodic Minimal Surface (TPMS) Schwarz diamond structure. The specimens were manufactured with two different Additive Manufacturing procedures employing various relative densities. More specifically, Material Jetting Printing (MJP) and Fused Filament Fabrication (FFF) processes were employed to investigate the performance of Acrylonitrile Butadiene Styrene (ABS) lightweight lattice structures. These structures were examined using digital microscopy in order to measure the dimensional accuracy and the surface characteristics of the utilized AM technologies. Furthermore, three-point bending tests and finite elements analyses have been applied to investigate the mechanical performance of the proposed technologies and designs as well as the influence of the relative density on the Schwarz diamond TPMS structure. The experimental results demonstrate that the investigated structure possesses a remarkable performance in respect to its weight due to the specific distribution of its material in space.

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Section: Dimensional and Surface Finish Inspectionmentioning

confidence: 99%

Section: Three-point Bending Tests and Fe Analysesmentioning

confidence: 99%

Experimental and Computational Investigation of Lattice Sandwich Structures Constructed by Additive Manufacturing Technologies

Kladovasilakis

Charalampous

Tsongas

et al. 2021

JMMP

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“…However, there are limited available standards to help in the choice of appropriate methods. For example, currently less than 1% of ISO/ASTM standards are related to surface finishing (Lee et al, 2020). Additionally, for high complexity parts or parts with closed channels, further consideration needs to be made on the choice of finishing method to avoid the post-processing being challenging, costly or unfeasible (Gilbert and Smith, 2020).…”

Section: Surface (Post)-processingmentioning

confidence: 99%

Surface Roughness Considerations in Design for Additive Manufacturing - A Literature Review

2021

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One often-cited benefit of using metal additive manufacturing (AM) is the possibility to design and produce complex geometries that suit the required function and performance of end-use parts. In this context, laser powder bed fusion (LPBF) is one suitable AM process. Due to accessibility issues and cost-reduction potentials, such ‘complex’ LPBF parts should utilise net-shape manufacturing with minimal use of post-process machining. The inherent surface roughness of LPBF could, however, impede part performance, especially from a structural perspective and in particular regarding fatigue. Engineers must therefore understand the influence of surface roughness on part performance and how to consider it during design. This paper presents a systematic literature review of research related to LPBF surface roughness. In general, research focuses on the relationship between surface roughness and LPBF build parameters, material properties, or post-processing. Research on design support on how to consider surface roughness during design for AM is however scarce. Future research on such supports is therefore important given the effects of surface roughness highlighted in other research fields.

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“…Preheating of the powder minimizes the energy required to reach the fusion point and prevents warping the part. Metallic support structures and post-processing operations are usually essential for these methods [40]. Fig.…”

Section: Techology and Materialsmentioning

confidence: 99%

Direct Metal Laser Sintering of Precious Metals for Jewelry Applications: Process Parameter Selection and Microstructure Analysis

Korium

Roozbahani²,

Alizadeh

et al. 2021

IEEE Access

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Direct Metal Laser Sintering (DMLS) is an advanced additive manufacturing (AM) technique for the 3D printing of metals. This technology is also beneficial in the jewelry industry, where precious metals are used, and the design and price are determinative factors. In this paper, the metal 3D printing process for jewelry production is discussed. Four rings made of gold, silver, titanium, and stainless-steel 316L have been designed and fabricated by AM machine based on the DMLS technique. Proper geometry and parameters for rings and support structure were determined. Results showed that a reduced amount of powder was required for 3D printing of metal rings using a locally developed AM machine. Besides, appropriate geometry and parameters for a jewelry box with a complex design have been specified to be fabricated from stainless steel 316L by the same AM machine. The quality of the final produced parts using DMLS technology was not demonstrated inferior compared to the quality of parts built by conventional manufacturing methods. Furthermore, utilizing an electron microscope the microstructures of the fabricated parts were obtained and analyzed in detail before and after polishing on the polisher machine. Results revealed that the maximum homogeneous surface was obtained for the gold and titanium samples, while the surface of the samples of stainless steel and silver had internal cavities, pores, and other defects. Also, it was concluded that usage of gold and silver for the manufacturing of jewelry product that does not experience heavy loads is quite justified.INDEX TERMS Additive Manufacturing (AM), Direct Metal Laser Sintering (DMLS), microstructure analysis, jewelry design, precious metals, 3D printing.

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A review on the state-of-the-art of surface finishing processes and related ISO/ASTM standards for metal additive manufactured components

Cited by 116 publications

References 143 publications

Experimental and Computational Investigation of Lattice Sandwich Structures Constructed by Additive Manufacturing Technologies

Experimental and Computational Investigation of Lattice Sandwich Structures Constructed by Additive Manufacturing Technologies

Surface Roughness Considerations in Design for Additive Manufacturing - A Literature Review

Direct Metal Laser Sintering of Precious Metals for Jewelry Applications: Process Parameter Selection and Microstructure Analysis

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