Production and Mechanical Behaviour of Biomedical CoCrMo Alloy

Cobalt-based alloy (Co-30Cr-5.5Mo) is produced by the investment casting process. This alloy complies with the ASTM F75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength, good corrosion resistance and excellent biocompatibility properties. SEM, XRD...

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Bibliographic Details
Published in:Chinese physics letters 2011-12, Vol.28 (12), p.126201-1-126201-4
Main Authors: Sahin, O, Tuncdemir, A. Rıza, Cetinkara, H. Ali, Guder, H. Salih, Sahin, E
Format: Article
Language:English
Subjects:
Cobalt base alloys
Hardness
Hardness tests
Indentation
Investment casting
Mechanical properties
Microhardness
Surgical implants
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Summary:Cobalt-based alloy (Co-30Cr-5.5Mo) is produced by the investment casting process. This alloy complies with the ASTM F75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength, good corrosion resistance and excellent biocompatibility properties. SEM, XRD and microhardness tests are used to examine the mechanical properties of the material. The examined material exhibits the behaviour of indentation size effect (ISE). Our results reveal that Vickers and Knoop microhardness are dependent on indentation test load. The traditional Meyer's law, the proportional specimen resistance (PSR) model and the Hays-Kendall model (HK) are used to analyze the load dependence of the hardness. As a result, the Hays-Kendall model is found to be the most effective to determine the load-independent hardness H sub(LI) of CoCrMo alloy.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/28/12/126201