Investigation of the Lattice Production of Removable Dental Prostheses with CoCr Alloy Using Additive Manufacturing

Additive manufacturing has become increasingly common in the last ten years for the production of designs that cannot be produced with traditional manufacturing methods or are very difficult and costly. Additive manufacturing is done by adding layer by layer in line with the production direction of the part. Support structures used in the manufacture of parts are a component of additive manufacturing. These structures form the base plate of the part, reduce thermal deformations and provide support for sagging that may occur on the surfaces. Therefore, the production direction of a part affects the quality, cost and other properties of the object. In this study, the effects of production direction on part integrity, geometric precision and surface roughness were investigated on a part designed to consist of flat, curved and angular surfaces. In this direction, roughness measurements were made from the upper surface of the samples produced and the effects of precision balance and support structures on the weight were examined. In addition, the images of the produced samples were transferred to the CAD environment and their geometric accuracy was investigated. The stability of the base plate and the sufficient cooling of the layers ensured the surface quality and geometric accuracy of the part. Inhomogeneous thermal stress on the base plate increases the deviation of the part from the nominal size.

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On Defect Minimization Caused by Oxide Phase Formation in Laser Powder Bed Fusion

Okunkova

Shekhtman

Metel

et al. 2022

Metals

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The article is devoted to the compressive review of the defects observed in the products of the machinery usage made mainly of anti-corrosion steels of the martensite-austenite group, difficult to process materials such as pure titanium, nickel, and their alloys, super and high entropy alloys and triple fusions produced by laser additive manufacturing, particularly the laser powder bed fusion. Studies were conducted on the structural defects observed in such products to improve their quality in the context of residual stress elimination, porosity reduction, and surface roughness improvement. Electrophysical and electrochemical treatment methods of removing oxide phase formation during melting and remelting of deposed tracks in layers are considered (such as ultrasound, plasma, laser, spark treatment, induction cleaning, redox annealing, gas–flame, plasma–beam, plasma–spark treatment). Types of pollution (physical and chemical) and cleaning methods, particularly plasma-based methods for oxide phase removing, are classified. A compressive comparison of low- and high-pressure plasma sources is provided. Special attention is focused on the atmospheric plasma sources based on a dielectric barrier and other discharges as a part of a production setup that presents the critical value of the conducted review in the context of the novelty for transition to the sixth technology paradigm associated with the Kondratieff’s waves.

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Investigation of the Lattice Production of Removable Dental Prostheses with CoCr Alloy Using Additive Manufacturing

Cited by 3 publications

References 27 publications

The state of additive manufacturing in dental research – A systematic scoping review of 2012–2022

The state of additive manufacturing in dental research – A systematic scoping review of 2012–2022

Eklemeli İmalatta Üretim Yönünün Parça Üretimine Etkileri

On Defect Minimization Caused by Oxide Phase Formation in Laser Powder Bed Fusion

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