Postprocessing of Additively Manufactured Metal Parts

Hung, Wayne

doi:10.1007/s11665-021-06037-z

Cited by 15 publications

(5 citation statements)

References 27 publications

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“…However, additively manufactured steel is not free of discontinuities, pores, sometimes unmelted particles, and so on, which can directly affect corrosion resistance. In addition, the direction of fabrication can affect porosity [16]. Therefore, other treatments are often used to improve these properties [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on corrosion resistance of additive manufactured 17-4PH steel

Świetlicki

Walczak

Szala

2022

Materials Science-Poland

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Components produced by additive manufacturing (AM) via direct metal laser sintering (DMLS) have typical as-fabricated surface defects. As a result, surface properties of AM products should be modified to increase their strength, anti-wear behavior, and at the same time ensure their high corrosion resistance. Surface modification via shot peening (SP) is considered suitable for AM of engineering devices made of 17-4PH (X5CrNiCuNb16-4) stainless steel. The objective of this study was to determine the effect of three types of peening media (CrNi steel shot, glass, and ceramic beads) on the corrosion resistance of specimens of DMLS 17-4PH stainless steel. Results demonstrated that SP caused steel microstructure refinement and induced both martensite (α) formation and retained austenite (γ) reduction. 17-4PH specimens peened showed the increase in surface hardness of 255, 281, and 260 HV0.2 for ceramic, glass, and steel, respectively. DMLS 17-4PH specimens modified by SP exhibited different surface morphology, hardness, and microstructure and thus, these properties affect corrosion performance. The results implied that steel shot peened with steel shot showed the highest resistance to corrosion processes (Icorr = 0.019 μA/cm2), slightly worse with glass (Icorr = 0.227 μA/cm2) and ceramics (Icorr = 0.660 μA/cm2) peened. In the case of ceramic and glass beads, it was possible to confirm the presence of the above-mentioned particles in the surface layer after SP.

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Section: Introductionmentioning

confidence: 99%

Effect of shot peening on corrosion resistance of additive manufactured 17-4PH steel

Świetlicki

Walczak

Szala

2022

Materials Science-Poland

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“…A major advantage of this technique is that it allows for the removal of surface roughness from within the lattice constructs, unlike most other methods which target only the outer surfaces [ 291 ]. On the other hand, chemical etching has been shown to be largely nonuniform in its treatment of surface roughness in SLM-built constructs [ 292 ].…”

Section: Post-processing Treatments To Improve Mechanical Properties ...mentioning

confidence: 99%

Titanium Alloy Implants with Lattice Structures for Mandibular Reconstruction

Hijazi,

Dixon,

Armstrong

et al. 2023

Materials

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In recent years, the field of mandibular reconstruction has made great strides in terms of hardware innovations and their clinical applications. There has been considerable interest in using computer-aided design, finite element modelling, and additive manufacturing techniques to build patient-specific surgical implants. Moreover, lattice implants can mimic mandibular bone’s mechanical and structural properties. This article reviews current approaches for mandibular reconstruction, their applications, and their drawbacks. Then, we discuss the potential of mandibular devices with lattice structures, their development and applications, and the challenges for their use in clinical settings.

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“…The residual, tensile (outer surface), and compressive (inner surface) stresses still remain in the steel component after its production from AM, which hinder the use of such parts of steel via milling, drilling, and other conventional processes because it can be generated trust forces, vibrations, and high frequency that may decrease the tool life rapidly, as discussed by Brandon and Eric in their study [206]. They also reported that residual stress also altered the chips' formation owing to high tensile forces at the outer surface when plastic deformation is reached.…”

Section: Post-processing Challenges Of Additive Manufactured Steelmentioning

confidence: 99%

Progressing towards Sustainable Machining of Steels: A Detailed Review

et al. 2021

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Machining operations are very common for the production of auto parts, i.e., connecting rods, crankshafts, etc. In machining, the use of cutting oil is very necessary, but it leads to higher machining costs and environmental problems. About 17% of the cost of any product is associated with cutting fluid, and about 80% of skin diseases are due to mist and fumes generated by cutting oils. Environmental legislation and operators’ safety demand the minimal use of cutting fluid and proper disposal of used cutting oil. The disposal cost is huge, about two times higher than the machining cost. To improve occupational health and safety and the reduction of product costs, companies are moving towards sustainable manufacturing. Therefore, this review article emphasizes the sustainable machining aspects of steel by employing techniques that require the minimal use of cutting oils, i.e., minimum quantity lubrication, and other efficient techniques like cryogenic cooling, dry cutting, solid lubricants, air/vapor/gas cooling, and cryogenic treatment. Cryogenic treatment on tools and the use of vegetable oils or biodegradable oils instead of mineral oils are used as primary techniques to enhance the overall part quality, which leads to longer tool life with no negative impacts on the environment. To further help the manufacturing community in progressing towards industry 4.0 and obtaining net-zero emissions, in this paper, we present a comprehensive review of the recent, state of the art sustainable techniques used for machining steel materials/components by which the industry can massively improve their product quality and production.

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Postprocessing of Additively Manufactured Metal Parts

Cited by 15 publications

References 27 publications

Effect of shot peening on corrosion resistance of additive manufactured 17-4PH steel

Effect of shot peening on corrosion resistance of additive manufactured 17-4PH steel

Titanium Alloy Implants with Lattice Structures for Mandibular Reconstruction

Progressing towards Sustainable Machining of Steels: A Detailed Review

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