Influence of Heat Treatment on Properties of Ti-nb Alloys

L. Kuncicka, J. Kliber, VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic P. Stepan, VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic I. Mamuzic, Croatian Metallurgical Society, Zagreb, Croatia Ti-Nb alloys are of a large potential for industrial, as well as biomedical utilisation. Ox ygen content in the alloy is a parameter infl uencing its pr operties and cannot be neglec ted. The main f ocus of this paper is on obser vation of infl uence of annealing time on oxygen content in the structure of Ti – 20,7 (at.)% Nb alloy. Four groups of the samples were annealed at the t emperature of 800 °C fr om 15 to 60 minutes with 15 min. st ep. As it was proven by the analysis, the o xygen content increased with incr easing annealing time . Moreover, microhardness measurements showed increasing trend of HV microhardness value with increasing oxygen content.