Development of a Novel Metastable Beta Alloy with Hot Isostatic Pressing

There is a notable interest in the development of 𝛼+𝛽 titanium alloys absent of millimeter-scale regions consisting of neighboring 𝛼-grains with aligned crystallographic orientations, known as microtextured regions (MTRs), and which exhibit superior mechanical properties while retaining reasonable ductility. In response to this interest, hot isostatic pressing (HIP) of a novel metastable 𝛽-titanium alloy, Ti-6Al-4V-3Fe, has been investigated. The HIP process was developed based on CALPHAD predictions with a goal to promote a uniform grain size and a fine distribution of the 𝛼-phase. This refined dispersion of the 𝛼-phase has resulted in an enhanced yield strength coupled with limited ductility. The first part of this talk presents the results of materials characterization of the HIP’ed alloy. The second part of this talk details the application of heat-treatments designed to optimize mechanical properties. The results of measurements to identify the presence of microtextured regions are also reported.