MÁLEK Jaroslav UJP PRAHA a.s.

Spoluautoři HNILICA František, VESELÝ Jaroslav

Beta titanium alloys are nowadays very often used in bioapplication due to their properties (e.g. corrosion resistance, low Young’s modulus and biocompatibility). Alloys with nominal chemical composition Ti-35Nb-XZr (X=0,2,4,6,8) wt.% were studied in this work. The influence of Zr on microstructure was the aim of this work. As cast specimens were homogenized, hot forged and solution treated (850°C/0,5h/water quenched). Light microscopy (LM) and scanning electron microscopy (SEM) with electron back scatter diffraction (EBSD) were used for microstructural characterization. The microstructure of solution treated alloys with low Zr fraction consists mainly of α” martensite. With increasing Zr content the microstructure changes into single β-phase. Also microstructural changes depending on Zr content after cold swaging were studied. After cold swagig the α” martensite can be observed also in specimens with higher Zr fraction. Hardness values were measured in order to determine the changes on mechanical properties with changing Zr content.