KADLEC, Jaromír and Filip ONDERKA. Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy. Littera Scripta. České Budějovice: Vysoká škola technická a ekonomická v Českých Budějovicích, 2013, vol. 6, No 2, p. 184-194. ISSN 1805-9112.
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Basic information
Original name Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy.
Authors KADLEC, Jaromír and Filip ONDERKA.
Edition Littera Scripta, České Budějovice, Vysoká škola technická a ekonomická v Českých Budějovicích, 2013, 1805-9112.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 20000 2. Engineering and Technology
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
Organization unit Institute of Technology and Business in České Budějovice
Keywords in English CoCrMo biocompatible alloy. Investment casting. Microstructure. Hardness and microhardness. Chemical composition.
Tags KSTR1
Tags Reviewed
Changed by Changed by: Mgr. Václav Karas, učo 10752. Changed: 18/3/2014 14:53.
Abstract
The aim of this work is to compare two different as-cast CoCrMo alloys. The microstructure of a cobalt-base alloy obtained by the investment casting process was studied. These alloys comply with the ISO 5832-4 standard and are widely used in the manufacturing of orthopedic implants because of them high strength, good corrosion resistance and excellent biocompatibility properties. This work focuses on the resulting microstructure arising from samples poured in vacuum furnace. The characterization of the samples was achieved by using optical microscopy, scanning electron microscopy (SEM) and energy dispersion spectroscopy techniques (EDS) for semi-quantitative chemical analysis. The hardness was measured by instrumented indentation test, microhardness test was applied to investigate microhardness of matrix and precipitates. General the as-cast microstructure is a Co-fcc dendritic matrix with the presence of a secondary phase, such as the M23C6 carbides precipitated at grain boundaries and interdendritic zones. These precipitates are the main strengthening mechanism in this type of alloys.
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