Feasibility Study for the Qualification of an Economically Advantageous Ti-6Al-4VBearing Housing for Gas Turbine Engine Application by Powder Metal Manufacturing Technology

摘要

This Small Business Innovative Research (SBIR) Phase I program has demonstratedthat titanium alloy aircraft engine components can be manufactured to near-net shape by an economical advanced powder metallurgy (P/M) process without compromising the structural performance and reliability of the component. In the program Ti-6A1-4V alloys test bar materials were made by the Dynamet CHIP process. Two types of alloy test material were evaluated, one utilizing standard low cost titanium powder containing 1500 ppm of chloride impurity and a second premium priced titanium powder with extra low levels of chloride. Tensile properties of the former material were near specified minimums for the forgings currently used in turbine engine components. For the extra low chloride material, however tensile strength and ductility were far in excess of the specified minimums.