Mirror finishing of Co–Cr–Mo alloy using elliptical vibration cutting

Song, Young-Chan; Park, Chun-Hong; Moriwaki, Toshimichi

doi:10.1016/j.precisioneng.2010.02.003

Cited by 36 publications

(13 citation statements)

References 7 publications

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“…The main material properties of these alloys are high strength, high hardness, high biocompatibility, high creep resistance and high corrosion and wear resistance superior to that of titanium based alloys [70][71][72]. These properties have made them appropriate candidates for medical implants, aero-engine, nuclear and gas turbine components [73].…”

Section: Cobalt-chromium Alloysmentioning

confidence: 99%

“…These properties have made them appropriate candidates for medical implants, aero-engine, nuclear and gas turbine components [73]. Similar to other refractory metal alloys, machinability of cobalt-chromium alloys suffers from work hardening and poor thermal conductivity of the material, resulting in low tool life and poor surface quality [70].…”

Section: Cobalt-chromium Alloysmentioning

confidence: 99%

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Environmentally conscious machining of difficult-to-machine materials with regard to cutting fluids

Shokrani

Dhokia

Newman

2012

International Journal of Machine Tools and Manufacture

724

238

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a b s t r a c tMachining difficult-to-machine materials such as alloys used in aerospace, nuclear and medical industries are usually accompanied with low productivity, poor surface quality and short tool life. Despite the broad use of the term difficult-to-machine or hard-to-cut materials, the area of these types of materials and their properties are not clear yet. On the other hand, using cutting fluids is a common technique for improving machinability and has been acknowledged since early 20th. However, the environmental and health hazards associated with the use of conventional cutting fluids together with developing governmental regulations have resulted in increasing machining costs. The aim of this paper is to review and identify the materials known as difficult-to-machine and their properties. In addition, different cutting fluids are reviewed and major health and environmental concerns about their usage in material cutting industries are defined. Finally, advances in reducing and/or eliminating the use of conventional cutting fluids are reviewed and discussed.

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Section: Cobalt-chromium Alloysmentioning

confidence: 99%

Section: Cobalt-chromium Alloysmentioning

confidence: 99%

Environmentally conscious machining of difficult-to-machine materials with regard to cutting fluids

Shokrani

Dhokia

Newman

2012

International Journal of Machine Tools and Manufacture

724

238

View full text Add to dashboard Cite

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“…All of these alloys are primarily composed of cobalt and chromium, but they may also include other metals like molybdenum to refine grain size, enhance solid solution strength, as well as increase corrosion resistance while nickel increases plasticity, fatigue crack growth resistance, and malleability of the alloy . These alloys are known to possess high wear resistance and good mechanical properties under static loadings . In the beginning stellite series of Co–Cr, alloys were developed composed of base material cobalt, 27–32% Cr, 4–6% W, 0.9–1.4% C and later vitallium composed of 62 % cobalt, 30% chromium, 6% molybdenum, 2% other elements (silicon, manganese, carbon) were patented.…”

Section: Biomaterials and Their Propertiesmentioning

confidence: 99%

“…37,38 These alloys are known to possess high wear resistance and good mechanical properties under static loadings. 39 In the beginning stellite series of Co-Cr, alloys were developed composed of base material cobalt, 27-32% Cr, 4-6% W, 0.9-1.4% C and later vitallium composed of 62 % cobalt, 30% chromium, 6% molybdenum, 2% other elements (silicon, manganese, carbon) were patented. Since then, there has not been a significant change in the composition of the alloy, except for the carbon content.…”

Section: Metals and Their Compositesmentioning

confidence: 99%

An overview of recent advances in designing orthopedic and craniofacial implants

Mantripragada

Lecka‐Czernik

Ebraheim

et al. 2013

J Biomedical Materials Res

224

135

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Great deal of research is still going on in the field of orthopedic and craniofacial implant development to resolve various issues being faced by the industry today. Despite several disadvantages of the metallic implants, they continue to be used, primarily because of their superior mechanical properties. In order to minimize the harmful effects of the metallic implants and its by-products, several modifications are being made to these materials, for instance nickel-free stainless steel, cobalt-chromium and titanium alloys are being introduced to eliminate the toxic effects of nickel being released from the alloys, introduce metallic implants with lower modulus, reduce the cost of these alloys by replacing rare elements with less expensive elements etc. New alloys like tantalum, niobium, zirconium, and magnesium are receiving attention given their satisfying mechanical and biological properties. Non-oxide ceramics like silicon nitride and silicon carbide are being currently developed as a promising implant material possessing a combination of properties such as good wear and corrosion resistance, increased ductility, good fracture and creep resistance, and relatively high hardness in comparison to alumina. Polymer/magnesium composites are being developed to improve mechanical properties as well as retain polymer’s property of degradation. Recent advances in orthobiologics are proving interesting as well. This paper thus deals with the latest improvements being made to the existing implant materials and includes new materials being introduced in the field of biomaterials.

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“…They observed decreases in surface roughness values obtained after machining. Song et al [5] machined the CoCrMo alloy using the elliptical vibration cutting method. Based on experimental results, elliptical vibration cutting performance was found to be superior than normal diamond cutting without tool vibration.…”

Section: Introduction mentioning

confidence: 99%

Investigation of Surface Quality of CoCrMo Alloy Used in the Tibial Component of the Knee Prosthesis According to the Methods of Turning and Turning-Grinding

Bahçe

Güler²,

Emir³

2019

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CoCrMo alloys, which are well-known Co-based biomedical alloys, have many different types of surface integrity problems reported in literature. Residual stresses, white layer formation and work hardening layers are some those, matters which occur as a microstructural alteration during machining. Therefore, such problems should be solved and surface quality of end products should be improved. In this paper, the surface quality of CoCrMo alloy used in tibial component of the knee prosthesis produced by means of turning was investigated. An improvement was suggested and discussed for the improvement in their machinability with the developed turning-grinding method. Finite element analyses were also carried out to calculate temperature and thermal stresses distribution between the tool and the tibial component. The results showed that many parameters such as cutting speed, feed rate, depth of cut, tool geometry, and tool wear affect the surface quality of workpieces of CoCrMo alloy. In the turning-grinding method, the machining time is reduced by about six times compared to machining only method. The EDX analysis performed on the surface after machining showed that metal diffusion occurred from tool to the tibial component.

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Mirror finishing of Co–Cr–Mo alloy using elliptical vibration cutting

Cited by 36 publications

References 7 publications

Environmentally conscious machining of difficult-to-machine materials with regard to cutting fluids

Environmentally conscious machining of difficult-to-machine materials with regard to cutting fluids

An overview of recent advances in designing orthopedic and craniofacial implants

Investigation of Surface Quality of CoCrMo Alloy Used in the Tibial Component of the Knee Prosthesis According to the Methods of Turning and Turning-Grinding

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