Cobalt-Chromium Alloys – Properties and Applications ☆

Antunes, Luiz Henrique Martinez; Lima, Carmo Roberto Pelliciari de

doi:10.1016/b978-0-12-803581-8.09386-3

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…However, metal implants naturally have much higher elastic modulus (e.g. 100-140 GPa for Ti alloys [4], 210-253 GPa for Co alloys [5] and 190-210 GPa for stainless steel [6]) than bone tissues (0.5-20 GPa) [7]. Such incompatible elastic modulus may lead to implant loosening or autogenous bone fracture.…”

Section: Introductionmentioning

confidence: 99%

Influence of the pore size and porosity of selective laser melted Ti6Al4V ELI porous scaffold on cell proliferation, osteogenesis and bone ingrowth

Chen

Yan

Yin

et al. 2020

Materials Science and Engineering: C

203

114

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Section: Introductionmentioning

confidence: 99%

Influence of the pore size and porosity of selective laser melted Ti6Al4V ELI porous scaffold on cell proliferation, osteogenesis and bone ingrowth

Chen

Yan

Yin

et al. 2020

Materials Science and Engineering: C

203

114

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“…represent the most popular materials widely used to manufacture permanent orthopedic devices. However, these conventionally produced materials have higher elastic moduli (100-140 GPa for Ti alloys [22], 210-253 GPa for Co alloys [23], and 190-210 GPa for stainless steel [24]) than that of bone (0.5-20 GPa) [25]. Such an incompatibility of stiffness between an implant and a bone can result in the stress shielding effect [26], leading to implant loosening or autogenous bone fracture.…”

Section: Am-aided Engineering Of "Ideal" Orthopedic Bioactive Implantsmentioning

confidence: 99%

Development of Bioactive Scaffolds for Orthopedic Applications by Designing Additively Manufactured Titanium Porous Structures: A Critical Review

Kiselevskiy,

Anisimova,

Kapustin

et al. 2023

Biomimetics

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We overview recent findings achieved in the field of model-driven development of additively manufactured porous materials for the development of a new generation of bioactive implants for orthopedic applications. Porous structures produced from biocompatible titanium alloys using selective laser melting can present a promising material to design scaffolds with regulated mechanical properties and with the capacity to be loaded with pharmaceutical products. Adjusting pore geometry, one could control elastic modulus and strength/fatigue properties of the engineered structures to be compatible with bone tissues, thus preventing the stress shield effect when replacing a diseased bone fragment. Adsorption of medicals by internal spaces would make it possible to emit the antibiotic and anti-tumor agents into surrounding tissues. The developed internal porosity and surface roughness can provide the desired vascularization and osteointegration. We critically analyze the recent advances in the field featuring model design approaches, virtual testing of the designed structures, capabilities of additive printing of porous structures, biomedical issues of the engineered scaffolds, and so on. Special attention is paid to highlighting the actual problems in the field and the ways of their solutions.

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“…Biocompatible cobalt alloys form a class of materials resistant to corrosion and wear in physiological environments. These alloys have a high fatigue strength, high modulus of elasticity, tensile strength, and ductility [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Tool wear and surface roughness characterization during turning of Co-Cr-Mo alloy ASTM F75 with coated carbide tools

Hassui

2023

Int J Adv Manuf Technol

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The cobalt chromium molybdenum (Co-Cr-Mo) system composes speci c alloys used in several biomedical applications, mainly in implants and prostheses manufacturing. Due to its intrinsic properties, the alloy processing is known as hard-to-machine. Therefore, in this work, we machined the Co-Cr-Mo alloy ASTM F75 and analyzed the effects of the cutting parameters on tool wear and the surface roughness generated during the turning. We performed a complete factorial with two factors, levels and replicas, in which the cutting speed varied from 60 to 90 m.min -1 and the feed rate from 0.08 to 0.13 mm.rev -1 . Through Scanning Electron Microscopy (SEM) and confocal microscopy analysis, we quanti ed wear on the cutting tool and the surface roughness of specimens. During the morphological studies, we noted the presence of crater and ank wear, with crater wear being predominant. This crater wear was exclusively in uenced by the change in feed rate due to the loss of tool coating. Moreover, the changes in cutting parameters signi cantly in uenced both cutting tool wear and workpiece surface roughness. The extreme cutting parameters caused signi cant differences in peak and valleys height on the turned workpiece surface. This way, the average roughness is strongly affected by the increase in tool wear induced by cutting parameters during the process. By energy dispersion spectroscopy (EDXA), we identi ed the chemical elements on the worn tool and workpiece surfaces which revealed that the primary mechanism causing tool wear is workpiece material adhesion to the insert rake surface. Furthermore, we con rmed the presence of carbides embedded on the machined surface, indicating abrasive action of these particles during cutting.

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Cobalt-Chromium Alloys – Properties and Applications ☆

Cited by 8 publications

References 8 publications

Influence of the pore size and porosity of selective laser melted Ti6Al4V ELI porous scaffold on cell proliferation, osteogenesis and bone ingrowth

Influence of the pore size and porosity of selective laser melted Ti6Al4V ELI porous scaffold on cell proliferation, osteogenesis and bone ingrowth

Development of Bioactive Scaffolds for Orthopedic Applications by Designing Additively Manufactured Titanium Porous Structures: A Critical Review

Tool wear and surface roughness characterization during turning of Co-Cr-Mo alloy ASTM F75 with coated carbide tools

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