Development of Ti-6Al-4V and Ti-1Al-8V-5Fe Alloys Using Low-Cost TiH2 Powder Feedstock
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Thermo-mechanical processing was performed on two titanium alloy billets, a beta-titanium alloy (Ti1Al8V5Fe) and an alpha-beta titanium alloy (Ti6Al4V), which had been produced using a novel low-cost powder metallurgy process that relies on the use of TiH2 powder as a feedstock material. The thermomechanical processing was performed in the beta region of the respective alloys to form 16-mm diameter bars. The hot working followed by the heat treatment processes not only eliminated the porosity within the materials but also developed the preferred microstructures. Tensile testing and rotating beam fatigue tests were conducted on the as-rolled and heat-treated materials to evaluate their mechanical properties. The mechanical properties of these alloys matched well with those produced by the conventional ingot processing route.
Keywordslow cost titanium powder metallurgy TiH2 Ti64 Ti185
The authors would like to thank the U. S. Department of Energy, Office of Fuel Cell and Vehicle Technologies (DOE/OFCVT) Program for the financial support provided for this project. Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the United States Department of Energy under Contract DE-AC06-76RLO1830. The authors would like to thank Clyde E. Chamberlin, Alan L. Schemer-Kohrn, and Danny J. Edwards of Pacific Northwest National Laboratory for the metallography-related analysis.
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