J 2013

Microstructural characterization, chemical composition and hardness of as-cast biocompatible CoCrMo alloy.

KADLEC, Jaromír and Filip ONDERKA

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

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

KSTR1

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.
Displayed: 23/12/2024 11:45