engleski

Comparison of microstructural characteristics for biomedical Ti(70, 80 at.%)-Cr-Mo and Ti(70, 80 at.%)-Nb-Zr alloys

This paper shows comparison of microstructural characteristics of Ti-Cr-Mo and Ti-Nb-Zr alloys. Purpose of this investigation was to examine the microstructure and hardness of these alloys with potential for biomedical use. Three samples of each alloy type with different composition were laboratory prepared by an arc melting method. Their microstructure was examined by light and scanning electron microscope with EDS. Hardness was determined by Vickers method. Results show that Ti-Cr-Mo alloys have two-phases microstructure containing β and alpha or alpha” phase, while Ti-Nb-Zr alloys were nearly β single-phase with traces of alpha-phase. EDS analysis indicates that alpha and β have similar chemical composition. Vickers hardness of Ti-Cr- Mo alloys increases with molybdenum content, while those for Ti-Nb-Zr alloys increases with niobium content. According to the closely single-phase microstructure and lower hardness, Ti-Nb-Zr alloys have adventage as potential biomedical materials.

Ti-Cr-Mo alloys ; Ti-Nb-Zr alloys ; biomedical alloys ; microstructure ; Vickers hardness

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