K. O. Yu, RMI Titanium Company, Niles, OH; S. Tamirisa, FMW Composite Systems Inc., Bridgeport, WV; R. Srinivasan, Wright State University, Dayton, OH; J. Gunasekera, Ohio University, Athens, OH; D. Miracle, Air Force Research Laboratory, Wright-Patterson AFB, OH
Adding boron to titanium can refine the ingot’s as-cast grain structure which can potentially improve the ingot’s hot workability and reduce the processing cost of the final product. In an Ohio State Government (through EMTEC) funded project, efforts are undertaken to evaluate the effects of boron addition on ingot grain structure and hot workability as well as the microstructure and property of sheets rolled from these ingots. Ti-6Al-4V ingots with (0.1% B) and without boron addition were cast by Induction Skull Melting and Plasma Arc Melting processes. Transverse and longitudinal slices were cut from these ingots and rolled to plates and sheets. Evaluations include ingot grain structure, sheet/plate microstructure and mechanical property.
Summary: Evaluating the effects of boron addition on grain structure and hot workability of titanium alloy ingots.