Experimental evaluation of bio medical titanium alloy stabilized with niobium

Abstract

Niobium stabilized titanium alloy has very less cytotoxicity effect compared to commercially pure titanium alloy (Ti-6Al-4 V). Flow behavior of the metals during hot deformation depends mainly on the strain rate and temperature. Such parameter plays a major role in understanding, and enhancing the workability of metals alloys in real life applications. When bio medical metal alloys are considered where, complex shapes of bio implants are major concern for which mechanical properties are analyzed experimentally. Further allows to optimizing those parameters for hot forging process based on required geometrical modelling. Experimental analysis can make reliable and precise prediction of flow behavior in real time industrial forming process. In this experiment, tensile test on bio medical titanium alloy specimen carried out at two different elevated temperatures ranging from 300℃ and 400℃ at strain rate of 10-3. Experiment carried out shows us flow stress, relation between engineering stress vs strain and true stress vs true strain. Along with this tensile fracture behavior of titanium alloy is examined with electron microscope (SEM) over a range of magnification. Micro hardness and microstructure are observed on the specimen appear to show how dislocation density changes increases with increasing strain rate, but decreases with increasing temperature. Deliberate outcomes manifest the yield and ultimate tensile strength continuously decreased with increase in temperature, and ductility (% elongation) increased with rise in temperature.