Production and Mechanical Behaviour of Biomedical CoCrMo Alloy

O.Sahin; A.Riza Tuncdemir; H.Ali Cetinkara; H.Salih Guder; E.Sahin

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Production and Mechanical Behaviour of Biomedical CoCrMo Alloy

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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 HLI of 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 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 ifLI of CoCrMo alloy.

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《中国物理快报：英文版》 |2011年第12期|215-218|共4页
作者
O.Sahin; A.Riza Tuncdemir; H.Ali Cetinkara; H.Salih Guder; E.Sahin;
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Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey;

Department of Prosthetic Dentistry, Dentistry Faculty, Mustafa Kemal University, Hatay, Turkey;

Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey;

Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey;

Department of Physics, Art and Science Faculty, Micro/Nanomechanic Characterization Laboratory, Mustafa Kemal University, Hatay, Turkey;

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Production and Mechanical Behaviour of Biomedical CoCrMo Alloy

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