Hydrogen Embrittlement of Zimaloy: A Cobalt-Chromium-Molybdenum Orthopedic Implant Alloy

Abstract UGI KC35N is a nonmagnetic nickel-cobalt-chromium-molybdenum alloy with a fully austenitic structure. This datasheet provides information on composition, physical properties, elasticity, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Co-124. Producer or source: Schmolz + Bickenbach USA Inc..

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Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5)

10.3403/00118776 ◽

1973 ◽

Keyword(s):

Cobalt Chromium ◽

Nickel Cobalt ◽

Solution Treated ◽

Cold Worked ◽

Nickel Base ◽

Cobalt Chromium Molybdenum ◽

Titanium Aluminium

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Prediction of tool-wear in turning of medical grade cobalt chromium molybdenum alloy (ASTM F75) using non-parametric Bayesian models

Journal of Intelligent Manufacturing ◽

10.1007/s10845-017-1317-3 ◽

2017 ◽

Vol 30 (3) ◽

pp. 1259-1270 ◽

Cited By ~ 7

Author(s):

Damien McParland ◽

Szymon Baron ◽

Sarah O’Rourke ◽

Denis Dowling ◽

Eamonn Ahearne ◽

...

Keyword(s):

Tool Wear ◽

Bayesian Models ◽

Molybdenum Alloy ◽

Cobalt Chromium ◽

Astm F75 ◽

Cobalt Chromium Molybdenum ◽

Medical Grade ◽

Non Parametric

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Surface treatment on cobalt and titanium alloys using picosecond laser pulses in burst mode

Applied Physics A ◽

10.1007/s00339-020-04179-w ◽

2020 ◽

Vol 127 (1) ◽

Author(s):

Daniel Metzner ◽

Peter Lickschat ◽

Steffen Weißmantel

Keyword(s):

Surface Treatment ◽

Picosecond Laser ◽

Laser Pulses ◽

Laser Source ◽

Time Interval ◽

Cobalt Chromium ◽

Burst Mode ◽

Self Organized ◽

Implant Alloys ◽

Cobalt Chromium Molybdenum

AbstractThe authors report on the results of surface treatment experiments using a solid-state amplified laser source emitting laser pulses with a pulse duration of 10 ps. The laser source allows the generation of pulse trains (bursts) with an intra-burst pulse repetition rate of 80 MHz (pulse-to-pulse time interval about 12.5 ns) with up to eight pulses per burst. In this study a wavelength of 1064 nm was used to investigate both ablation of material and laser-induced surface modifications occuring in metallic implant alloys CoCrMo (cobalt-chromium-molybdenum) and TiAlV (titanium-aluminum-vanadium) in dependence of the number of pulses and fluences per pulse in the burst. By using the burst mode, a smoothing effect occurs in a certain parameter range, resulting in very low surface roughness of the generated microstructures. It is demonstrated that at fluences per pulse which are smaller than the material-specific ablation threshold, a self-organized pore formation takes place if a defined number of pulses per burst is used. Thus, the advantage of the MHz burst mode in terms of a possible surface modification is established.

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Peri-implant cartilage and bone histological changes following treatment of focal osteochondral defects in the femoral head with polyether ether ketone implants versus cobalt chromium molybdenum alloy implants: assessment in a goat model

10.21203/rs.3.rs-20256/v2 ◽

2020 ◽

Author(s):

Zhiguo Yuan ◽

Wei Zhang ◽

Xiangchao Meng ◽

Jue Zhang ◽

Teng TengLong ◽

...

Keyword(s):

Femoral Head ◽

Osteochondral Defect ◽

Osteochondral Defects ◽

Cobalt Chromium ◽

Cocrmo Alloy ◽

Polyether Ether Ketone ◽

Histological Score ◽

Ether Ketone ◽

Cobalt Chromium Molybdenum

Abstract Objective: This study aimed to quantitatively investigate the peri-implant histology of applying defect-size polyether ether ketone (PEEK) implant for the treatment of localized osteochondral defects in the femoral head and compared it with cobalt chromium molybdenum (CoCrMo) alloy implant.Methods: A femoral head osteochondral defect model was created in the left hips of goats (n=12). Defects were randomly treated by immediate placement of a PEEK (n=6) or CoCrMo implant (n=6). The un-operated right hip joints served as a control. Goats were sacrificed at 12 weeks. Periprosthetic cartilage quality was semi-quantitatively analyzed macroscopically and microscopically. Implant osseointegration was measured by micro-CT and histomorphometry.Results: The modified macroscopic articular evaluation score in the PEEK group was lower than that in the CoCrMo group (p<0.05), and the histological score of the periprosthetic and acetabular cartilage in the PEEK group was lower than that in the CoCrMo group (P<0.05). The mean bone-implant contact for PEEK implants was comparable with that for CoCrMo alloy implants at 12 weeks.Conclusions: A PEEK implant for the treatment of local osteochondral defect in the femoral head demonstrated effective fixation and superior in vivo cartilage protection compared with an identical CoCrMo alloy implant.

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Microstructure and Mechanical Properties Study of CoCrMo Parts Sintered under Control Atmosphere

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1133.85 ◽

2016 ◽

Vol 1133 ◽

pp. 85-89

Author(s):

Mohamad Azmirruddin Ahmad ◽

Fazira Suriani Mohamed Fadzil ◽

Mazlan Mohamad ◽

Mohamad Hasnan Abdul Hamid ◽

Mohd Asri Selamat

Keyword(s):

Mechanical Properties ◽

Sintering Temperature ◽

Inert Gases ◽

Cobalt Chromium ◽

Sintered Compact ◽

Sintering Atmosphere ◽

Knee Replacements ◽

Powder Pressing ◽

Cobalt Chromium Molybdenum ◽

Bio Compatibility

Their excellent properties, such as corrosion resistance, fatigue strength and bio-compatibility, made Cobalt-chromium-molybdenum (CoCrMo) were used in total hip and knee replacements and dental devices. The green CoCrMo compacts specimens in rectangle shape were fabricated by powder pressing technique. The effects of sintering temperature and atmosphere on the mechanical properties and microstructure of the CoCrMo compacts which is sintered at 1300°C-1400°C under two different inert gases sintering atmosphere (Ar2/N2H2) were investigated. The experimental results show that the grain boundaries sizes of CoCrMo compact sintered specimen were increased with increasing sintering temperature. The CoCrMo compacts specimens sintered at 1350°C under inert gases N2H2 atmosphere possess highest density (8.096 g/cm3) and hardness (327.1Hv). However, when the compacts specimens are sintered at 1400°C, the density (7.596 g/cm3) and hardness (320 Hv) properties of sintered compact were decreased.

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High speed end milling of cobalt chromium molybdenum alloy using solid carbide tool under MQL condition

10.1063/1.5118186 ◽

2019 ◽

Author(s):

H. A. Zaman ◽

S. Sharif ◽

M. H. Idris ◽

A. S. Mohruni ◽

P. Y. M. W. Ndaruhadi ◽

...

Keyword(s):

High Speed ◽

End Milling ◽

Molybdenum Alloy ◽

Carbide Tool ◽

Cobalt Chromium ◽

Solid Carbide ◽

Cobalt Chromium Molybdenum

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Surface Formation Mechanisms in Selective Laser Melting of Cobalt-Chromium-Molybdenum Powder

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.839.73 ◽

2020 ◽

Vol 839 ◽

pp. 73-78

Author(s):

Alexander A. Saprykin ◽

Yuriy P. Sharkeev ◽

Natalya A. Saprykina ◽

Egor A. Ibragimov

Keyword(s):

Selective Laser Melting ◽

Marangoni Effect ◽

Powdered Material ◽

Formation Mechanisms ◽

Cobalt Chromium ◽

Laser Melting ◽

Movement Velocity ◽

Surface Formation ◽

Preheating Temperature ◽

Cobalt Chromium Molybdenum

Selective laser melting (SLM) is a manufacturing technology of metal parts of any shapes with target mechanical properties by means of laser melting. This paper discusses the effect of SLM parameters: laser output power, laser movement velocity, scanning pitch and preheating temperature of a powdered material on surface formation mechanism, namely, its physical configuration when melting cobalt-chromium-molybdenum powdered material Со28Cr3Mo. The study points at structural differences of melted surfaces even under identical process parameters. Several types of surface formation are identified, e.g. homogenous melt, coagulated particles, and shapeless particles. Vapor pressure, Marangoni effect, and heat effect of a melted powder are stated to be key reasons for rough surface. This research is of high importance for understanding the effect of SLM parameters on formation of a target quality surface, positive stability and repeatable accuracy of the process.

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