Chemical surface finishing of electron beam melted Ti6Al4V using HF-HNO3 solutions

Scherillo, Fabio; Manco, Emanuele; Hassanin, Andrea El; Franchitti, Stefania; Pirozzi, Carmine; Borrelli, Rosario

doi:10.1016/j.jmapro.2020.10.033

Cited by 23 publications

(5 citation statements)

References 39 publications

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“…In this context, we have organized the surface finishing techniques used in the literature for FDM 3D printed polymer composites into three categories: chemical, physical, and thermal surface finishing (Figure 1) each offering unique advantages and disadvantages. Chemical methods, such electroplating and electroless plating, can be applied to complex geometries and offer uniform coatings and improved characteristics, 29 but they come with complicated control requirements and environmental problems. 30 Physical methods, such as machining, are versatile and precise, but because they come into direct contact with the surface, they may suffer from tool wear.…”

Section: Surface Finishing Processesmentioning

confidence: 99%

In‐depth investigation and industry plan for enhancing surface finishing of 3D printed polymer composite components: A critical review

Karimi,

Bozorgnia Tabary,

Fayazfar

2024

J of Applied Polymer Sci

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Additive manufacturing (AM) is pivotal in modern manufacturing, allowing diverse materials to create functional parts. Polymer composites, with superior properties like enhanced mechanics and conductivity, are highly regarded. Fused deposition modeling (FDM) is a favored, cost‐effective AM technique. Despite popularity, FDM struggles with poor surface quality, impacting final part properties. This challenge affects composite part performance, prompting a need for surface quality enhancements in AM processes, like FDM. The review explores essential post‐treatments required to optimize composite parts for various applications. It examines surface finishing techniques for FDM 3D printed polymeric composites, categorizing them into chemical, thermal, and physical methods. Recent research is extensively analyzed, offering a comprehensive guide for academia and industry. The review covers diverse aspects, including properties, surface morphology, electrical conductivity, and mechanical properties pre‐ and post‐finishing methods. Additionally, it summarizes leading companies worldwide providing surface finishing services for 3D printed polymer parts. Discussions on future trends, challenges, and research gaps in this field are included, emphasizing its significance in refining surface finishing methods for FDM 3D‐printed polymeric composites and encouraging broader industrial adoption of AM. This overview serves as a crucial roadmap for engineers, scientists, customers, and companies interested in surface finishing services.

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Section: Surface Finishing Processesmentioning

confidence: 99%

In‐depth investigation and industry plan for enhancing surface finishing of 3D printed polymer composite components: A critical review

Karimi,

Bozorgnia Tabary,

Fayazfar

2024

J of Applied Polymer Sci

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“…Titanium (Ti) alloys are widely spread in industrial applications due to their specific strength and corrosion resistance [43], thanks to their osteointegration properties are also used in biomedical applications[44,45]. An interesting point is that titanium is hard to be machined material [46], so alongside with chemical finishing [47], LP can be considered a viable surface finishing process for this alloy.…”

Section: Laser Polishing On Am Metal Alloysmentioning

confidence: 99%

Laser polishing of additively manufactured metal parts: a review

Manco

Cozzolino

Astarita

2022

Surface Engineering

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This paper provides a reliable state of the art of laser polishing process (LP), used to reduce surface roughness and to improve surface properties of additively manufactured metal parts. The motivation of this review and the introduction to the research topic are discussed in detail in the first part of the paper, then the fundamentals and the working principles of LP are exposed. A quantitative literature survey is also included, the main research streams are discussed, the most used laser sources and the most investigated materials are highlighted. The manuscript core is divided into five subchapters depending on the material to be polished: aluminium alloys, titanium alloys, steels, CoCr alloys and nickel alloys. Each of these discusses the laser adopted, the results obtained, the role of the process parameters and the physical phenomena ruling the process. The final section includes applications, advantages, direction of future work and main conclusions drawn.

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“…El Ti6Al4V es uno de los materiales más comunes que se fabrican con esta tecnología, en particular para aplicaciones aeroespaciales y biomédicas [25]. La fusión por haz de electrones (Electron Beam Melting EBM) es un proceso de manufactura aditiva que a pesar de las ventajas que presenta en la fabricación de piezas con diseños complejos, adaptación de las propiedades y el menor desperdicio de material, el acabado superficial final obtenido con este proceso EBM tiene una rugosidad media de 10-30 µm [26], [24]. Para generar la superficie funcional con tolerancias estrechas de ˂ 0.5 µm, es necesario el mecanizado CNC.…”

Section: Introductionunclassified

Comportamiento biotribológico de prototipos de implantes de la aleación Ti6Al4V fabricados por EBM y posteriormente anodizados

Ramírez,

Zapata,

Vargas

et al. 2023

TecnoL.

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Las articulaciones de la cadera pueden resultar dañadas por causas metabólicas (enfermedad degenerativa) o mecánicas (fractura), limitando su funcionalidad. Para restablecer el movimiento de la articulación, esta debe ser sustituida por una prótesis de cadera. En las articulaciones se producen fenómenos de lubricación, fricción y desgaste que, a su vez, suelen ser responsables del fallo de la prótesis, provocando su aflojamiento. Por tal motivo, el objetivo del presente estudio consistió en evaluar el comportamiento biotribológico de un prototipo de prótesis de cadera de Ti6Al4V manufacturado mediante fabricación aditiva por haz de electrones (EBM) y posteriormente modificado superficialmente mediante anodizado. Una vez obtenido el prototipo, se pulieron algunas muestras para realizar ensayos biotribológicos y otras para anodizarlas. Las pruebas biotribológicas se realizaron en un tribómetro de esfera sobre disco utilizando contracuerpos de alúmina de 6 mm de diámetro, empleando una carga de 5 N y velocidades de 30, 50 y 70 rpm. Se obtuvieron huellas de desgaste de 2 mm de diámetro, utilizando como medio un fluido corporal simulado (SBF) a una temperatura de 37 °C. El proceso EBM incrementó la dureza de la aleación Ti6Al4V respecto al proceso de forja convencional. Las muestras fabricadas por EBM, y posteriormente anodizadas, revelaron los valores más altos de coeficientes de fricción, mientras que las muestras fabricadas por forja y EBM indicaron coeficientes de fricción similares para todas las velocidades estudiadas. Adicionalmente, las muestras fabricadas por EBM, y después anodizadas, señalaron la menor tasa de desgaste, seguidas por las muestras fabricadas por EBM, mientras que las muestras fabricadas por forja evidenciaron la mayor tasa de desgaste. Igualmente, se encontró abrasión como principal mecanismo de desgaste en todas las condiciones evaluadas en las pruebas biotribológicas. Con la velocidad de 30 rpm se obtuvieron las menores tasas de desgaste para la aleación de Ti6Al4V con los diferentes procesos de fabricación; con esta misma velocidad se obtuvieron las mayores tasas de desgaste de los contracuerpos de todos los pares biotribológicos.

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Chemical surface finishing of electron beam melted Ti6Al4V using HF-HNO3 solutions

Cited by 23 publications

References 39 publications

In‐depth investigation and industry plan for enhancing surface finishing of 3D printed polymer composite components: A critical review

In‐depth investigation and industry plan for enhancing surface finishing of 3D printed polymer composite components: A critical review

Laser polishing of additively manufactured metal parts: a review

Comportamiento biotribológico de prototipos de implantes de la aleación Ti6Al4V fabricados por EBM y posteriormente anodizados

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