Detailed Information on Publication Record
2013
Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy.
KADLEC, Jaromír and Filip ONDERKABasic 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
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
20000 2. Engineering and Technology
Country of publisher
Czech Republic
Confidentiality degree
není předmětem státního či obchodního tajemství
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
Tags
Reviewed
Změněno: 18/3/2014 14:53, Mgr. Václav Karas
Abstract
V originále
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.