Structure and properties of titanium, alloyed by oxygen

Abstract

In this work the possibility of using of the gaseous oxygen as alloying component in process of chamber electroslag remelting (ChESR) of titanium sponge is considered. The oxygen is concerned to list of main admixtures of technically clean titanium, which provide the essential influence on its properties. However in contrast to nitrogen and hydrogen it renders not only negative, but also positive influence on titanium properties. Increase the contents of the oxygen brings about increasing of strength, hardness but reduction of the plasticity of titanium. Controlling its contents in metal in determined degree, it is possible to reach the optimum correlation between the plastic and strengthening characteristic of the titanium alloy. The oxygen it is possible to consider as perspective alloying element to obtain new titanium alloy. This is particularly important for medical product, for which along with mechanical properties on the first plan go out corrosion stability and biocompatibility. In contrast to other alloying component (for instance, vanadium), the oxygen is more safe. The most economic expedient it is using the gaseous oxygen for alloying of titanium. In this work the titanium samples with content of the oxygen from 0.035 to 0.27% were investigated, which got by alloying by oxygen directly from gas phase in process of chamber electroslag remelting of titanium sponge.