Microstructures in Beta-III Titanium Alloys
In an effort to increase the elastic modulus of commercial Beta-III Titanium alloy (Ti-12Mo4.5Sn5.5Zr) without impairing other mechanical properties, the alloy has been solutionized in the beta and beta/alpha fields and subsequently aged at the alpha and alpha/omega forming temperature range, following water quench; the volume fraction and morphology of the precipitation phases govern the elastic modulus and other mechanical characteristics. Dilatometric technique was employed to determine the omega forming range which is indicated by a notable contraction; contraction is due to depletion of the Mo content in the beta phase. TEM was utilized in order to identify the phases and define morphology whereas the volume fraction of phases was determined by X-ray.