scholarly journals Fretting-corrosion of materials used as orthopaedic implants

Wear ◽  
2005 ◽  
Vol 259 (7-12) ◽  
pp. 943-951 ◽  
Author(s):  
Jean Geringer ◽  
Bernard Forest ◽  
Pierre Combrade
Keyword(s):  
Fretting Corrosion ◽  
Orthopaedic Implants ◽  
Materials Used

FRETTING CORROSION STUDIES OF MATERIALS USED FOR ELEMENTS OF HIP JOINT ENDOPROSTHESES

Tribologia ◽  
2018 ◽  
Vol 281 (5) ◽  
pp. 143-151 ◽  
Author(s):  
Agnieszka WIELOWIEJSKA-GIERTUGA ◽  
Tomasz WIŚNIEWSKI ◽  
Rafał RUBACH
Keyword(s):  
Corrosion Resistance ◽  
Fretting Corrosion ◽  
Hip Joints ◽  
Hip Endoprosthesis ◽  
Corrosion Studies ◽  
Pin On Disc ◽  
Materials Used ◽  
Damage Processes ◽  
Optimized Conditions ◽  
Selection Of

The operational durability of a hip endoprosthesis depends, among others, on the intensity of the damage processes of kinematic junction elements caused by fretting corrosion processes. In the article, the results of comparative studies on the fretting corrosion resistance of alloys commonly used for hip joints, i.e. Ti6Al4V, CoCrMo, stainless steel M30NW, and 316LVM, are presented. The research was carried out by means of a tribological pin-on-disc tester working in reciprocating motion, integrated with a potentiostat equipped with a triac electrode. The tribosystem was a pin pressed by a constant force to a reciprocating disc with a certain amplitude and frequency. The tests were carried out in a medium of aqueous bovine serum heated to 37°C. The conducted comparative tests of the above mentioned materials will allow selection of the best material combination in terms of tribological and fretting corrosion resistance. Under optimized conditions, the modified oils obtained a needed appropriate viscosity class.

scholarly journals How to Study Biofilms after Microbial Colonization of Materials Used in Orthopaedic Implants

2016 ◽  
Vol 17 (3) ◽  
pp. 293 ◽  
Author(s):  
Lorenzo Drago ◽  
Serse Agrappi ◽  
Monica Bortolin ◽  
Marco Toscano ◽  
Carlo Romanò ◽  
...  
Keyword(s):  
Microbial Colonization ◽  
Orthopaedic Implants ◽  
Materials Used

Wear analysis of materials used as orthopaedic implants

Wear ◽  
2006 ◽  
Vol 261 (9) ◽  
pp. 971-979 ◽  
Author(s):  
Jean Geringer ◽  
Bernard Forest ◽  
Pierre Combrade
Keyword(s):  
Orthopaedic Implants ◽  
Wear Analysis ◽  
Materials Used

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

High Voltage Transmission Microscopy of Surveyor III Camera Shrouds

1971 ◽  
Vol 29 ◽  
pp. 138-139
Author(s):  
W. R. Duff ◽  
L. E. Thomas ◽  
R. M. Fisher ◽  
S. V. Radcliffe
Keyword(s):  
Alloy Sheet ◽  
Transmission Microscopy ◽  
Television Camera ◽  
Window Method ◽  
Transmission Electron ◽  
Microstructural Effects ◽  
Lunar Environment ◽  
Successful Retrieval ◽  
Materials Used ◽  
Abrasive Paper

Successful retrieval of the television camera and other components from the Surveyor III spacecraft by the Apollo 12 astronauts has provided a unique opportunity to study the effects of a known and relatively extensive exposure to the lunar environment. Microstructural effects including those produced by micro-meteorite impact, radiation damage (by both the solar wind and cosmic rays) and solar heating might be expected in the materials used to fabricate the spacecraft. Samples received were in the form of 1 cm2 of painted unpainted aluminum alloy sheet from the top of the camera visor (JPL Code 933) and the sides (935,936) and bottom (934) of the lower camera shroud. They were prepared for transmission electron microscopy by first hand-grinding with abrasive paper to a thickness of 0.006". The edges were lacquered and the sample electropolished in 10% perchloric methanol using the “window” method, to a thickness of ~0.001". Final thinning was accomplished by polishing 3 mm punched disks in an acetic-phosphoric-nitric acid solution.

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